phy: qcom-ufs: fix build error when the component is built as a module

Export the following functions in order to avoid build errors
when the component PHY_QCOM_UFS is compiled as a module:

ERROR: "ufs_qcom_phy_disable_ref_clk"
	[drivers/scsi/ufs/ufs-qcom.ko] undefined!
ERROR: "ufs_qcom_phy_enable_ref_clk"
	[drivers/scsi/ufs/ufs-qcom.ko] undefined!
ERROR: "ufs_qcom_phy_is_pcs_ready"
	[drivers/scsi/ufs/ufs-qcom.ko] undefined!
ERROR: "ufs_qcom_phy_disable_iface_clk"
	[drivers/scsi/ufs/ufs-qcom.ko] undefined!
ERROR: "ufs_qcom_phy_start_serdes"
	[drivers/scsi/ufs/ufs-qcom.ko] undefined!
ERROR: "ufs_qcom_phy_calibrate_phy"
	[drivers/scsi/ufs/ufs-qcom.ko] undefined!
ERROR: "ufs_qcom_phy_enable_dev_ref_clk"
	[drivers/scsi/ufs/ufs-qcom.ko] undefined!
ERROR: "ufs_qcom_phy_set_tx_lane_enable"
	[drivers/scsi/ufs/ufs-qcom.ko] undefined!
ERROR: "ufs_qcom_phy_disable_dev_ref_clk"
	[drivers/scsi/ufs/ufs-qcom.ko] undefined!
ERROR: "ufs_qcom_phy_save_controller_version"
	[drivers/scsi/ufs/ufs-qcom.ko] undefined!
ERROR: "ufs_qcom_phy_enable_iface_clk"
	[drivers/scsi/ufs/ufs-qcom.ko] undefined!
make[1]: *** [__modpost] Error 1
Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

drivers/phy/phy-qcom-ufs.c

@@ -432,6 +432,7 @@ int ufs_qcom_phy_enable_ref_clk(struct phy *generic_phy)
 out:
 	return ret;
 }
+EXPORT_SYMBOL_GPL(ufs_qcom_phy_enable_ref_clk);
 
 static
 int ufs_qcom_phy_disable_vreg(struct phy *phy,
@@ -474,6 +475,7 @@ void ufs_qcom_phy_disable_ref_clk(struct phy *generic_phy)
 		phy->is_ref_clk_enabled = false;
 	}
 }
+EXPORT_SYMBOL_GPL(ufs_qcom_phy_disable_ref_clk);
 
 #define UFS_REF_CLK_EN	(1 << 5)
 
@@ -517,11 +519,13 @@ void ufs_qcom_phy_enable_dev_ref_clk(struct phy *generic_phy)
 {
 	ufs_qcom_phy_dev_ref_clk_ctrl(generic_phy, true);
 }
+EXPORT_SYMBOL_GPL(ufs_qcom_phy_enable_dev_ref_clk);
 
 void ufs_qcom_phy_disable_dev_ref_clk(struct phy *generic_phy)
 {
 	ufs_qcom_phy_dev_ref_clk_ctrl(generic_phy, false);
 }
+EXPORT_SYMBOL_GPL(ufs_qcom_phy_disable_dev_ref_clk);
 
 /* Turn ON M-PHY RMMI interface clocks */
 int ufs_qcom_phy_enable_iface_clk(struct phy *generic_phy)
@@ -550,6 +554,7 @@ int ufs_qcom_phy_enable_iface_clk(struct phy *generic_phy)
 out:
 	return ret;
 }
+EXPORT_SYMBOL_GPL(ufs_qcom_phy_enable_iface_clk);
 
 /* Turn OFF M-PHY RMMI interface clocks */
 void ufs_qcom_phy_disable_iface_clk(struct phy *generic_phy)
@@ -562,6 +567,7 @@ void ufs_qcom_phy_disable_iface_clk(struct phy *generic_phy)
 		phy->is_iface_clk_enabled = false;
 	}
 }
+EXPORT_SYMBOL_GPL(ufs_qcom_phy_disable_iface_clk);
 
 int ufs_qcom_phy_start_serdes(struct phy *generic_phy)
 {
@@ -578,6 +584,7 @@ int ufs_qcom_phy_start_serdes(struct phy *generic_phy)
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(ufs_qcom_phy_start_serdes);
 
 int ufs_qcom_phy_set_tx_lane_enable(struct phy *generic_phy, u32 tx_lanes)
 {
@@ -595,6 +602,7 @@ int ufs_qcom_phy_set_tx_lane_enable(struct phy *generic_phy, u32 tx_lanes)
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(ufs_qcom_phy_set_tx_lane_enable);
 
 void ufs_qcom_phy_save_controller_version(struct phy *generic_phy,
 					  u8 major, u16 minor, u16 step)
@@ -605,6 +613,7 @@ void ufs_qcom_phy_save_controller_version(struct phy *generic_phy,
 	ufs_qcom_phy->host_ctrl_rev_minor = minor;
 	ufs_qcom_phy->host_ctrl_rev_step = step;
 }
+EXPORT_SYMBOL_GPL(ufs_qcom_phy_save_controller_version);
 
 int ufs_qcom_phy_calibrate_phy(struct phy *generic_phy, bool is_rate_B)
 {
@@ -625,6 +634,7 @@ int ufs_qcom_phy_calibrate_phy(struct phy *generic_phy, bool is_rate_B)
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(ufs_qcom_phy_calibrate_phy);
 
 int ufs_qcom_phy_remove(struct phy *generic_phy,
 			struct ufs_qcom_phy *ufs_qcom_phy)
@@ -662,6 +672,7 @@ int ufs_qcom_phy_is_pcs_ready(struct phy *generic_phy)
 	return ufs_qcom_phy->phy_spec_ops->
 			is_physical_coding_sublayer_ready(ufs_qcom_phy);
 }
+EXPORT_SYMBOL_GPL(ufs_qcom_phy_is_pcs_ready);
 
 int ufs_qcom_phy_power_on(struct phy *generic_phy)
 {