kernel: fix typos in KernelPackage description

kernel: fix typos in KernelPackage description

Fixes: ed2839ac4190 ("kernel/modules: add kmod-pmbus-zl6100 module")
Fixes: bbcb9de93547 ("Add package for gpio rotary encoder")
Fixes: 76854589829a ("package/kernel: package kmod-input-matrixkmap")
Fixes: 8bfef353850a ("kernel: rename kmod-switch-rtl8366_smi to
       kmod-switch-rtl8366-smi to avoid underscores in package names")
Fixes: f03bf608b151 ("kernel: Add dummy sound driver")
Fixes: dda5d9b78643 ("ramips: rename pwm kernel module")

Signed-off-by: Sungbo Eo <mans0n@gorani.run>