hwmon: (pmbus) Documentation updates
hwmon: (pmbus) Documentation updates

Fix spelling, correct label name error, and add missing attribute to PMBus
driver documentation.

Signed-off-by: Guenter Roeck <32ce62c5480002985aec58d7044038218061ef55@ericsson.com>
Reviewed-by: Tom Grennan <9172ec9ee644c8fc6fef4656cf9aaece529ba163@ericsson.com>

TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs