fix(spm): omit enabling/disabling SRI physical interrupt

The SPMC takes care of enabling the SRI physical SGI interrupt on all
cores. Omit doing it from TFTF.

Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Change-Id: Ie1a4bdc898213107959eaac912aae5c6058114f5
1 file changed