powerpc/tools: Remove 90 line limit in checkpatch script

As of commit bdc48fa11e46, scripts/checkpatch.pl now has a default line
length warning of 100 characters. The powerpc wrapper script was using
a length of 90 instead of 80 in order to make checkpatch less
restrictive, but now it's making it more restrictive instead.

I think it makes sense to just use the default value now.

Signed-off-by: Russell Currey <[e-mail]>
Signed-off-by: Michael Ellerman <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

arch/powerpc/tools/checkpatch.sh

···
 exec $script_base/../../../scripts/checkpatch.pl \
 	--subjective \
 	--no-summary \
-	--max-line-length=90 \
 	--show-types \
 	--ignore ARCH_INCLUDE_LINUX \
 	--ignore BIT_MACRO \