90kernel-modules: arm: add drivers/hwmon for arm/arm64

90kernel-modules: arm: add drivers/hwmon for arm/arm64

In the case of the s805x the drivers/hwmon directory contains the
scpi_hwmon kernel module.
On a running system, lsmod would output the following dependencies:
 arm_scpi               24576  2 clk_scpi,scpi_hwmon

It means that if the clock driver is bundled in the initramfs it will
bring arm_scpi. But if scpi_hwmon is missing the scpi will be incomplete
and it can lead to crashes.

When the hwmon is bundled, no crash occurs

Signed-off-by: Nicolas Chauvet <kwizart@gmail.com>