powerpc/vdso: Remove VDSO32_LBASE and VDSO64_LBASE

VDSO32_LBASE and VDSO64_LBASE are 0. Remove them to simplify code.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/6c4d6570d886bbe1cc471e8ca01602e4b4d9beb5.1601197618.git.christophe.leroy@csgroup.eu

arch/powerpc/include/asm/vdso.h

@@ -4,10 +4,6 @@
 
 #ifdef __KERNEL__
 
-/* Default link addresses for the vDSOs */
-#define VDSO32_LBASE	0x0
-#define VDSO64_LBASE	0x0
-
 /* Default map addresses for 32bit vDSO */
 #define VDSO32_MBASE	0x100000
 

arch/powerpc/kernel/vdso32/vdso32.lds.S

@@ -17,7 +17,7 @@ ENTRY(_start)
 SECTIONS
 {
 	PROVIDE(_vdso_datapage = . - PAGE_SIZE);
-	. = VDSO32_LBASE + SIZEOF_HEADERS;
+	. = SIZEOF_HEADERS;
 
 	.hash          	: { *(.hash) }			:text
 	.gnu.hash      	: { *(.gnu.hash) }

arch/powerpc/kernel/vdso64/vdso64.lds.S

@@ -17,7 +17,7 @@ ENTRY(_start)
 SECTIONS
 {
 	PROVIDE(_vdso_datapage = . - PAGE_SIZE);
-	. = VDSO64_LBASE + SIZEOF_HEADERS;
+	. = SIZEOF_HEADERS;
 
 	.hash		: { *(.hash) }			:text
 	.gnu.hash	: { *(.gnu.hash) }