include/cpu/amd/mtrr: return uint32_t from get_top_of_mem_below_4gb

The top of memory below 4GB will always fit into 32 bits, so change the
return type accordingly.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I6b463a17f2db3b7a99ff3572f318c9c22aac7431
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74610
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martin.roth@amd.corp-partner.google.com>

0 files changed, 0 insertions, 0 deletions