tzc400: adjust filter flag if it is set to FILTER_BIT_ALL
tzc400: adjust filter flag if it is set to FILTER_BIT_ALL

TZC_400_REGION_ATTR_FILTER_BIT_ALL is a simple constant definition, so
it can't get the real filter number to construct the bit flag for all
existing filters. If the platform doesn't have 4 filters, passing
FILTER_BIT_ALL to tzc400_configure_region() will cause assertion or
misconfiguration. So adjust the bit flag against the real filter
number.

Signed-off-by: Heyi Guo <554902d6d74fca466aa06b42f6ec0849d7c72a90@linux.alibaba.com>
Change-Id: Ie5c48303485f3b5015772961ee7c34746121ee84

achingupta/arm-trusted-firmware,achingupta/arm-trusted-firmware