plat/sgi: increase number of xlat tables

With the recent updates, the SGI based platforms require a higher number
of xlat tables. So update MAX_XLAT_TABLES macro accordingly.

Signed-off-by: Thomas Abraham <thomas.abraham@arm.com>
Change-Id: I0d2b16a6ceffc09a37b7f67ad519c28648dc0383
1 file changed