src: Remove duplicated round up function

This removes CEIL_DIV and div_round_up() altogether and
replace it by DIV_ROUND_UP defined in commonlib/helpers.h.

Change-Id: I9aabc3fbe7834834c92d6ba59ff0005986622a34
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/29847
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
diff --git a/src/lib/edid.c b/src/lib/edid.c
index 957897e..8d18393 100644
--- a/src/lib/edid.c
+++ b/src/lib/edid.c
@@ -1689,7 +1689,7 @@
 
 	edid->framebuffer_bits_per_pixel = fb_bpp;
 	edid->bytes_per_line = ALIGN_UP(edid->mode.ha *
-		div_round_up(fb_bpp, 8), row_byte_alignment);
+		DIV_ROUND_UP(fb_bpp, 8), row_byte_alignment);
 	edid->x_resolution = edid->bytes_per_line / (fb_bpp / 8);
 	edid->y_resolution = edid->mode.va;
 }