oprom: fix compilation for Qemu target (and possibly others)

Not sure why this didn't bite us earlier..

src/device/oprom/realmode/x86.c: In function 'fill_lb_framebuffer':
src/device/oprom/realmode/x86.c:272:13: error: dereferencing pointer to incomplete type
src/device/oprom/realmode/x86.c:274:13: error: dereferencing pointer to incomplete type
src/device/oprom/realmode/x86.c:275:13: error: dereferencing pointer to incomplete type
src/device/oprom/realmode/x86.c:276:13: error: dereferencing pointer to incomplete type
src/device/oprom/realmode/x86.c:278:13: error: dereferencing pointer to incomplete type
src/device/oprom/realmode/x86.c:280:13: error: dereferencing pointer to incomplete type
src/device/oprom/realmode/x86.c:281:13: error: dereferencing pointer to incomplete type
src/device/oprom/realmode/x86.c:283:13: error: dereferencing pointer to incomplete type
src/device/oprom/realmode/x86.c:284:13: error: dereferencing pointer to incomplete type
src/device/oprom/realmode/x86.c:286:13: error: dereferencing pointer to incomplete type
src/device/oprom/realmode/x86.c:287:13: error: dereferencing pointer to incomplete type
src/device/oprom/realmode/x86.c:289:13: error: dereferencing pointer to incomplete type
src/device/oprom/realmode/x86.c:290:13: error: dereferencing pointer to incomplete type

Change-Id: Ie3b0f731a7b995e954a26e745b07fc122088ca9f
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/2321
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>
diff --git a/src/device/oprom/realmode/x86.c b/src/device/oprom/realmode/x86.c
index 07eff0d..6e76992 100644
--- a/src/device/oprom/realmode/x86.c
+++ b/src/device/oprom/realmode/x86.c
@@ -33,6 +33,7 @@
 #include <lib/jpeg.h>
 /* we use x86emu's register file representation */
 #include <x86emu/regs.h>
+#include <boot/coreboot_tables.h>
 
 /* to have a common register file for interrupt handlers */
 X86EMU_sysEnv _X86EMU_env;