arm64: configs: wahoo: disable UNMAP_KERNEL_AT_EL0

wahoo's SoC architecture does not require this security fix

Bug: 69856074
Change-Id: I49cc91c97bf60062dbae9e8eeb65c5a287aa1360
Signed-off-by: Jonathan Solnit <jsolnit@google.com>

arch/arm64/configs/wahoo_defconfig

@@ -70,6 +70,7 @@ CONFIG_CMA_DEBUGFS=y
 CONFIG_ZSMALLOC=y
 CONFIG_BALANCE_ANON_FILE_RECLAIM=y
 CONFIG_SECCOMP=y
+# CONFIG_UNMAP_KERNEL_AT_EL0 is not set
 CONFIG_ARMV8_DEPRECATED=y
 CONFIG_SWP_EMULATION=y
 CONFIG_CP15_BARRIER_EMULATION=y