The patch of kernel 6.12 missing cpufreq part for
mt7988d, causing the ccifreq driver probe to fail.
Add it to avoid mt7988d devices boot hang.
Fixes: a9822e8 ("kernel/mediatek: 6.12: drop patches which have been applied upstream")
Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>