Fix board init code to respect the C runtime environment

board_init_f_mem() alters the C runtime environment's
stack it is actually already using. This is not a valid
behaviour within a C runtime environment.

Split board_init_f_mem into C functions which do not alter
their own stack and always behave properly with respect to
their C runtime environment.

Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
Acked-by: Thomas Chou <thomas@wytron.com.tw>
diff --git a/arch/arm/lib/crt0.S b/arch/arm/lib/crt0.S
index 80548eb..4f2a712 100644
--- a/arch/arm/lib/crt0.S
+++ b/arch/arm/lib/crt0.S
@@ -83,8 +83,9 @@
 	bic	sp, sp, #7	/* 8-byte alignment for ABI compliance */
 #endif
 	mov	r0, sp
-	bl	board_init_f_mem
+	bl	board_init_f_alloc_reserve
 	mov	sp, r0
+	bl	board_init_f_init_reserve
 
 	mov	r0, #0
 	bl	board_init_f