Revert "x86_64: Increase stack size for KASAN_EXTRA"

This reverts commit a8e911d.
KASAN_EXTRA was removed via the commit 7771bdb ("kasan: remove use
after scope bugs detection."), so this is no longer needed.

Signed-off-by: Qian Cai <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Ingo Molnar <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]

Author: Qian Cai

arch/x86/include/asm/page_64_types.h

@@ -7,11 +7,7 @@
 #endif
 
 #ifdef CONFIG_KASAN
-#ifdef CONFIG_KASAN_EXTRA
-#define KASAN_STACK_ORDER 2
-#else
 #define KASAN_STACK_ORDER 1
-#endif
 #else
 #define KASAN_STACK_ORDER 0
 #endif