Various += were used, refactor these to be either = or .= depending on
usuage.
CONFLICTS should be '=', as no leading space is required and they are not
amending any other conflict settings.
The TUNE_CCARGS should be .= so that if the feature does not define a CCARG
blank spaces are not added to the CFLAGS. This is consistent to how the arm
tuning is implemented.
Signed-off-by: Mark Hatle <mark.hatle@xilinx.com> Signed-off-by: Mark Hatle <mark.hatle@kernel.crashing.org> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
