ARM: SMDKC100: fix frame buffer definitions

The definition of the framebuffer parameters was created when s3c-fb.c
driver was patched to support setting the refresh rate directly (commit
600ce1a0). That patch was completely wrong
and was reverted in commit eb29a5cc

 what breaked the
framebuffer on s5pc100. This patch updates framebuffer definitions to
correct values.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>