Fix IMA kconfig warning on non-X86 architectures:

warning: (IMA) selects TCG_TIS which has unmet direct dependencies
(TCG_TPM && X86)
Signed-off-by: NRandy Dunlap <rdunlap@xenotime.net>
Reported-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Acked-by: NRajiv Andrade <srajiv@linux.vnet.ibm.com>
Signed-off-by: NJames Morris <james.l.morris@oracle.com>