fix format: remove tailing whitespace

Signed-off-by: Du Huanpeng <u74147@gmail.com>
mips ar9331: fix format mach/reset.h

arch/mips/mach-ar9331/include/mach/reset.h

Signed-off-by: Du Huanpeng <u74147@gmail.com>
mips ar9331: <mach/reset> fix format again

Signed-off-by: Du Huanpeng <u74147@gmail.com>
mips ar933x: use unreachable() instead of while(1)

Signed-off-by: Du Huanpeng <u74147@gmail.com>