mediatek: Add function to raise the CPU frequency

Implement mt_pll_raise_ca53_freq() in MT8183 to raise the CPU frequency.
Move the function declaration to common header.

BUG=b:80501386
BRANCH=none
Test=Boots correctly on Kukui

Change-Id: Ide8d767486d68177fa2bfbcc5b559879eca1bcda
Signed-off-by: Tristan Shieh <tristan.shieh@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32465
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/soc/mediatek/common/include/soc/pll_common.h

@@ -69,5 +69,6 @@ void pll_set_pcw_change(const struct pll *pll);
 void mux_set_sel(const struct mux *mux, u32 sel);
 int pll_set_rate(const struct pll *pll, u32 rate);
 void mt_pll_init(void);
+void mt_pll_raise_ca53_freq(u32 freq);
 
 #endif