MIPS: Simplify param.h by using <asm-generic/param.h>

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/810/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>