clk: samsung: add plls used by the s3c2443

The s3c2443 uses different plls that are not present yet. Therefore
add the two needed types.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>