ANDROID: Re-enable CONFIG_STM for allmodconfig

It was disabled due to ld.lld discarding the __memcat_p symbol even
though it was exported -- see [1]. However, this issue has now been
fixed upstream in 7273ad2b08 ("kbuild: link lib-y objects to
vmlinux forcibly when CONFIG_MODULES=y"), so CONFIG_STM can now be
enabled safely.

[1] https://github.com/ClangBuiltLinux/linux/issues/515

Bug: 140224784
Fixes: dd88a4a1d5 ("ANDROID: Fix x86_64 allmodconfig build")
Signed-off-by: Quentin Perret <qperret@google.com>
Change-Id: Ic0dede721f67a0f2ff80ba27cb2a2aa9c7c03db3

build.config.allmodconfig

@@ -6,8 +6,6 @@ function update_config() {
     ${KERNEL_DIR}/scripts/config --file ${OUT_DIR}/.config \
          -d TEST_KMOD  \
          -d CPU_BIG_ENDIAN \
-         -d STM \
-         -d TEST_MEMCAT_P \
          -e UNWINDER_FRAME_POINTER \
 
     (cd ${OUT_DIR} && \