net: phy: qca807x: fix compilation when CONFIG_GPIOLIB is not set

Kernel bot has discovered that if CONFIG_GPIOLIB is not set compilation
will fail.

Upon investigation the issue is that qca807x_gpio() is guarded by a
preprocessor check but then it is called under
if (IS_ENABLED(CONFIG_GPIOLIB)) in the probe call so the compiler will
error out since qca807x_gpio() has not been declared if CONFIG_GPIOLIB has
not been set.

Fixes: d1cb613e ("net: phy: qcom: add support for QCA807x PHY Family")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202403031332.IGAbZzwq-lkp@intel.com/Signed-off-by: Robert Marko <robimarko@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Tested-by: Simon Horman <horms@kernel.org> # build-tested
Link: https://lore.kernel.org/r/20240305142113.795005-1-robimarko@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/phy/qcom/qca807x.c

@@ -732,7 +732,7 @@ static int qca807x_probe(struct phy_device *phydev)
 	priv->dac_disable_bias_current_tweak = of_property_read_bool(node,
 								     "qcom,dac-disable-bias-current-tweak");
 
-	if (IS_ENABLED(CONFIG_GPIOLIB)) {
+#if IS_ENABLED(CONFIG_GPIOLIB)
 	/* Make sure we don't have mixed leds node and gpio-controller
 	 * to prevent registering leds and having gpio-controller usage
 	 * conflicting with them.
@@ -749,7 +749,7 @@ static int qca807x_probe(struct phy_device *phydev)
 		if (ret)
 			return ret;
 	}
-	}
+#endif
 
 	/* Attach SFP bus on combo port*/
 	if (phy_read(phydev, QCA807X_CHIP_CONFIGURATION)) {