sunxi: enable cpufreq driver for H6 SoC

Allwinner H6 needs this driver to enable DVFS support.
May also be used with H616/H618 SoC in the future.

Signed-off-by: Chukun Pan <[email protected]>

target/linux/sunxi/config-5.15

@@ -17,7 +17,7 @@ CONFIG_ARCH_SUNXI=y
 CONFIG_ARCH_SUNXI_MC_SMP=y
 CONFIG_ARCH_SUSPEND_POSSIBLE=y
 CONFIG_ARM=y
-# CONFIG_ARM_ALLWINNER_SUN50I_CPUFREQ_NVMEM is not set
+CONFIG_ARM_ALLWINNER_SUN50I_CPUFREQ_NVMEM=y
 CONFIG_ARM_APPENDED_DTB=y
 CONFIG_ARM_ARCH_TIMER=y
 CONFIG_ARM_ARCH_TIMER_EVTSTREAM=y

target/linux/sunxi/config-6.1

@@ -18,7 +18,7 @@ CONFIG_ARCH_SUNXI=y
 CONFIG_ARCH_SUNXI_MC_SMP=y
 CONFIG_ARCH_SUSPEND_POSSIBLE=y
 CONFIG_ARM=y
-# CONFIG_ARM_ALLWINNER_SUN50I_CPUFREQ_NVMEM is not set
+CONFIG_ARM_ALLWINNER_SUN50I_CPUFREQ_NVMEM=y
 CONFIG_ARM_APPENDED_DTB=y
 CONFIG_ARM_ARCH_TIMER=y
 CONFIG_ARM_ARCH_TIMER_EVTSTREAM=y