staging: fpgaboot: fix coccinelle warnings

drivers/staging/gs_fpgaboot/gs_fpgaboot.c:191:2-3: Unneeded semicolon

 Removes unneeded semicolon.

Generated by: coccinelle/misc/semicolon.cocci

CC: Insop Song <insop.song@gainspeed.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>