arm64: enable time namespace support

CONFIG_TIME_NS is dependes on GENERIC_VDSO_TIME_NS.

Signed-off-by: Andrei Vagin <[email protected]>
Reviewed-by: Vincenzo Frascino <[email protected]>
Reviewed-by: Dmitry Safonov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>

Author: avagin

arch/arm64/Kconfig

@@ -118,6 +118,7 @@ config ARM64
 	select GENERIC_STRNLEN_USER
 	select GENERIC_TIME_VSYSCALL
 	select GENERIC_GETTIMEOFDAY
+	select GENERIC_VDSO_TIME_NS
 	select HANDLE_DOMAIN_IRQ
 	select HARDIRQS_SW_RESEND
 	select HAVE_PCI