MAINTAINERS: Update sirf patterns

commit 3370dc91 ("pinctrl:sirf:re-arch and add support for
new SiRFatlas6 SoC") moved the files, update the patterns.

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Barry Song <21cnbao@gmail.com>
cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>