global: Migrate CONFIG_FSL_PMIC_BUS to CFG

Perform a simple rename of CONFIG_FSL_PMIC_BUS to CFG_FSL_PMIC_BUS

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/freescale/mx51evk/mx51evk.c b/board/freescale/mx51evk/mx51evk.c
index 86364ac..95edb35 100644
--- a/board/freescale/mx51evk/mx51evk.c
+++ b/board/freescale/mx51evk/mx51evk.c
@@ -86,7 +86,7 @@
 	struct pmic *p;
 	int ret;
 
-	ret = pmic_init(CONFIG_FSL_PMIC_BUS);
+	ret = pmic_init(CFG_FSL_PMIC_BUS);
 	if (ret)
 		return;