Eliminate do_div().

This eliminates the use of do_div() in favor of using libgcc
functions.

This was tested by building and booting on Google Snow (ARMv7)
and Qemu (x86). printk()s which use division in vtxprintf() look good.

Change-Id: Icad001d84a3c05bfbf77098f3d644816280b4a4d
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/2606
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/lib/Makefile.inc

@@ -48,6 +48,7 @@ romstage-$(CONFIG_USBDEBUG) += usbdebug.c
 romstage-$(CONFIG_COLLECT_TIMESTAMPS) += timestamp.c cbmem.c
 romstage-y += compute_ip_checksum.c
 romstage-y += memmove.c
+romstage-$(CONFIG_ARCH_X86) += gcc.c
 
 ramstage-y += hardwaremain.c
 ramstage-y += selfboot.c
@@ -94,6 +95,7 @@ smm-y += cbfs.c memcmp.c
 smm-$(CONFIG_CONSOLE_SERIAL8250) += uart8250.c
 smm-$(CONFIG_CONSOLE_SERIAL8250MEM) += uart8250mem.c
 smm-$(CONFIG_USBDEBUG) += usbdebug.c
+smm-y += gcc.c
 
 $(obj)/lib/version.ramstage.o : $(obj)/build.h