fix(printf): increase TESTCASE_OUTPUT_MAX_SIZE

The SMCCC_ARCH_WORKAROUND_2 test tftf_testcase_printf
encountered a string truncation error on multi clusters.
The value of 512 bytes was insufficient for a system with
16 cores, therefore, it has been increased to 1024 bytes
to address the issue.

Signed-off-by: Prasad Kummari <prasad.kummari@amd.com>
Change-Id: I15875c67137bf0491aa2da3fa1517ce789abacd8
1 file changed