UPSTREAM: efi: stub: define DISABLE_BRANCH_PROFILING for all architectures

This moves the DISABLE_BRANCH_PROFILING define from the x86 specific
to the general CFLAGS definition for the stub. This fixes build errors
when building for arm64 with CONFIG_PROFILE_ALL_BRANCHES_ENABLED.

Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk>
Reported-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>

Bug: 30369029
Patchset: rework-pagetable

(cherry picked from commit b523e185)
Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Change-Id: Id5a2a3986adc60ddf3d247c038667ce9719f3ee0