airoha: rename kmod-pwm-an7581 to kmod-pwm-airoha

airoha: rename kmod-pwm-an7581 to kmod-pwm-airoha

Certain targets for an7581 and an7583 referred to kmod-pwm-airoha;
however in the target modules makefile the module is referred to
as kmod-pwm-an7581, causing buildbot to fail.

Change the name of kmod-pwm-an7581 to kmod-pwm-airoha to resolve this.

Signed-off-by: Kenneth Kasilag <kenneth@kasilag.me>
Link: https://github.com/openwrt/openwrt/pull/22445
Signed-off-by: Robert Marko <robimarko@gmail.com>
(cherry picked from commit 7d2c244646d9caf895e5e03ea8f47f4089c2abec)
Link: https://github.com/openwrt/openwrt/pull/22466
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>