staging: gs_fpgpaboot: fix compiler warning with make W=1
staging: gs_fpgpaboot: fix compiler warning with make W=1

the following compiler warning has been fixed:

drivers/staging/gs_fpgaboot/gs_fpgaboot.c: In function ‘gs_read_bitstream’:
drivers/staging/gs_fpgaboot/gs_fpgaboot.c:160:6: warning: variable ‘size’ set but not used [-Wunused-but-set-variable]
  CC      drivers/staging/gs_fpgaboot/io.o
  LD      drivers/staging/gs_fpgaboot/gs_fpga.o
  LD      drivers/staging/gs_fpgaboot/built-in.o

by removing the size variable.

Signed-off-by: Devendra Naga <fd804d867f876a740efab4a617adf22cebf0ce04@gmail.com>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs