random: vDSO: Drop custom PAGE_SIZE definitions

These custom definitions where added in commit 7f053812da ("random:
vDSO: minimize and simplify header includes") to avoid pulling in
non-vDSO-safe headers from linux/page.h.

vdso/page.h provides these definitions for the vDSO now. Use that instead.

Signed-off-by: Thomas Weißschuh <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Link: https://patch.msgid.link/[email protected]

lib/vdso/getrandom.c

@@ -8,6 +8,7 @@
 #include <vdso/datapage.h>
 #include <vdso/getrandom.h>
 #include <vdso/limits.h>
+#include <vdso/page.h>
 #include <vdso/unaligned.h>
 #include <asm/barrier.h>
 #include <asm/vdso/getrandom.h>
@@ -18,11 +19,6 @@
 /* Bring in default accessors */
 #include <vdso/vsyscall.h>
 
-#undef PAGE_SIZE
-#undef PAGE_MASK
-#define PAGE_SIZE (1UL << CONFIG_PAGE_SHIFT)
-#define PAGE_MASK (~(PAGE_SIZE - 1))
-
 #define MEMCPY_AND_ZERO_SRC(type, dst, src, len) do {				\
 	while (len >= sizeof(type)) {						\
 		__put_unaligned_t(type, __get_unaligned_t(type, src), dst);	\