parisc: remove duplicated #include
parisc: remove duplicated #include

Remove duplicated #include('s) in
  arch/parisc/kernel/signal.c

Signed-off-by: Huang Weiyi <3747a8217f9c255c8b609f0f2e71d2a8804c1b96@gmail.com>
Signed-off-by: Kyle McMartin <3c25b01657254677d3e1a8fd1f0742c5d489bd39@mcmartin.ca>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas