defconfig: change localversion to perf

This is Stratosphere, however we're changing it to "-perf"
as this branch of the kernel will be used for ROM builds.

The submodules have to be synced before building, otherwise
building kernel will fail.

Signed-off-by: David112x <86davidx64@gmail.com>

arch/arm64/configs/surya_defconfig

@@ -48,7 +48,7 @@ CONFIG_THREAD_INFO_IN_TASK=y
 CONFIG_INIT_ENV_ARG_LIMIT=32
 CONFIG_CROSS_COMPILE=""
 # CONFIG_COMPILE_TEST is not set
-CONFIG_LOCALVERSION="-Stratosphere"
+CONFIG_LOCALVERSION="-perf"
 # CONFIG_LOCALVERSION_AUTO is not set
 CONFIG_DEFAULT_HOSTNAME="(none)"
 CONFIG_SWAP=y