chore: cosmetic manifest parsing error printing

Omit full stop for error messages in manifest_strerror.

Remove printing the error message from parse_ffa_partition_package as
this is redundant with the message printed by [1].

[1] https://git.trustedfirmware.org/hafnium/hafnium.git/tree/src/init.c?h=v2.9#n145

Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Change-Id: I1b54cb726a682e7a2b6b8f94f98b7ee41c0be76f
1 file changed