mpc85xx: rename sdram_init() lbc_sdram_init()

sdram_init() is used to initialize sdram on the lbc.  Rename it
accordingly.

Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c b/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c
index 10fcd24..6f401e7 100644
--- a/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c
+++ b/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c
@@ -11,11 +11,11 @@
 
 #ifdef CONFIG_MPC85xx
 /* Boards should provide their own version of this if they use lbc sdram */
-void __sdram_init(void)
+void __lbc_sdram_init(void)
 {
 	/* Do nothing */
 }
-void sdram_init(void) __attribute__((weak, alias("__sdram_init")));
+void lbc_sdram_init(void) __attribute__((weak, alias("__lbc_sdram_init")));
 #endif