arm: Add ENTRY/ENDPROC to private libgcc functions

When CONFIG_SYS_THUMB_BUILD is defined these functions may be called from
Thumb code. Add the required ENTRY and ENDPROC bracketing so that BLX is
used to call these ARM functions, instead of plain BL, which will fail.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reported-by: Pavel Machek <pavel@denx.de>
diff --git a/arch/arm/lib/_udivsi3.S b/arch/arm/lib/_udivsi3.S
index 1309802..3b653be 100644
--- a/arch/arm/lib/_udivsi3.S
+++ b/arch/arm/lib/_udivsi3.S
@@ -1,3 +1,5 @@
+#include <linux/linkage.h>
+
 /* # 1 "libgcc1.S" */
 @ libgcc1 routines for ARM cpu.
 @ Division routines, written by Richard Earnshaw, (rearnsha@armltd.co.uk)
@@ -72,8 +74,7 @@
 	ldmia	sp!, {pc}
 	.size  __udivsi3       , . -  __udivsi3
 
-.globl __aeabi_uidivmod
-__aeabi_uidivmod:
+ENTRY(__aeabi_uidivmod)
 
 	stmfd	sp!, {r0, r1, ip, lr}
 	bl	__aeabi_uidiv
@@ -81,9 +82,9 @@
 	mul	r3, r0, r2
 	sub	r1, r1, r3
 	mov	pc, lr
+ENDPROC(__aeabi_uidivmod)
 
-.globl __aeabi_idivmod
-__aeabi_idivmod:
+ENTRY(__aeabi_idivmod)
 
 	stmfd	sp!, {r0, r1, ip, lr}
 	bl	__aeabi_idiv
@@ -91,3 +92,4 @@
 	mul	r3, r0, r2
 	sub	r1, r1, r3
 	mov	pc, lr
+ENDPROC(__aeabi_idivmod)