Don't populate the array 'registers' on the stack but instead make it
static const. Makes the object code smaller by 45 bytes.

Before:
   text	   data	    bss	    dec	    hex	filename
  17364	   5000	      0	  22364	   575c	platform/s3c-camif/camif-regs.o

After:
   text	   data	    bss	    dec	    hex	filename
  17255	   5064	      0	  22319	   572f	platform/s3c-camif/camif-regs.o

(gcc version 9.2.1, amd64)
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>