global: Migrate CONFIG_PCIE_IMX_PERST_GPIO to CFG

Perform a simple rename of CONFIG_PCIE_IMX_PERST_GPIO to CFG_PCIE_IMX_PERST_GPIO

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/mx6sxsabresd.h b/include/configs/mx6sxsabresd.h
index 8b02c3b..85e5cfb 100644
--- a/include/configs/mx6sxsabresd.h
+++ b/include/configs/mx6sxsabresd.h
@@ -123,7 +123,7 @@
 #endif
 
 #ifdef CONFIG_CMD_PCI
-#define CONFIG_PCIE_IMX_PERST_GPIO	IMX_GPIO_NR(2, 0)
+#define CFG_PCIE_IMX_PERST_GPIO	IMX_GPIO_NR(2, 0)
 #define CONFIG_PCIE_IMX_POWER_GPIO	IMX_GPIO_NR(2, 1)
 #endif