[POWERPC] bootwrapper: missing relocation in crt0.S

crt0.S had provisions to provide run address relocaton to got2 and
cache flush, but not on the bss clear or stack pointer load.  Apply
the same fixup for them.
Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/boot/crt0.S

@@ -65,10 +65,12 @@ _zimage_start_lib:
 	/* Clear the BSS */
 	lis	r9,__bss_start@ha
 	addi	r9,r9,__bss_start@l
+	add	r9,r0,r9
 	lis	r8,_end@ha
 	addi	r8,r8,_end@l
-	li	r0,0
-5:	stw	r0,0(r9)
+	add	r8,r0,r8
+	li	r10,0
+5:	stw	r10,0(r9)
 	addi	r9,r9,4
 	cmplw	cr0,r9,r8
 	blt	5b
@@ -79,7 +81,9 @@ _zimage_start_lib:
 	addi	r8,r8,_platform_stack_top@l
 	cmpwi	r8,0
 	beq	6f
+	add	r8,r0,r8
 	lwz	r1,0(r8)
+	add	r1,r0,r1
 	li	r0,0
 	stwu	r0,-16(r1)	/* establish a stack frame */
 6: