phy: cadence: salvo: Constify cdns_nxp_sequence_pair

cdns_nxp_sequence_pair[] are never modified and can be made const to allow
the compiler to put them in read-only memory.
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Reviewed-by: Peter Chen <peter.chen@nxp.com>
Link: https://lore.kernel.org/r/20200912204639.501669-3-rikard.falkeborn@gmail.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/phy/cadence/phy-cadence-salvo.c

@@ -97,7 +97,7 @@ struct cdns_reg_pairs {
 
 struct cdns_salvo_data {
 	u8 reg_offset_shift;
-	struct cdns_reg_pairs *init_sequence_val;
+	const struct cdns_reg_pairs *init_sequence_val;
 	u8 init_sequence_length;
 };
 
@@ -126,7 +126,7 @@ static void cdns_salvo_write(struct cdns_salvo_phy *salvo_phy,
  * Below bringup sequence pair are from Cadence PHY's User Guide
  * and NXP platform tuning results.
  */
-static struct cdns_reg_pairs cdns_nxp_sequence_pair[] = {
+static const struct cdns_reg_pairs cdns_nxp_sequence_pair[] = {
 	{0x0830, PHY_PMA_CMN_CTRL1},
 	{0x0010, TB_ADDR_CMN_DIAG_HSCLK_SEL},
 	{0x00f0, TB_ADDR_CMN_PLL0_VCOCAL_INIT_TMR},
@@ -217,7 +217,7 @@ static int cdns_salvo_phy_init(struct phy *phy)
 		return ret;
 
 	for (i = 0; i < data->init_sequence_length; i++) {
-		struct cdns_reg_pairs *reg_pair = data->init_sequence_val + i;
+		const struct cdns_reg_pairs *reg_pair = data->init_sequence_val + i;
 
 		cdns_salvo_write(salvo_phy, reg_pair->off, reg_pair->val);
 	}