[bsp][gd32] fix pwm enable channel check#11547

Rbb666 merged 2 commits into

RT-Thread:masterRT-Thread/rt-thread:masterfrom

Old-Ding:codex/fix-gd32-pwm-enable-channelOld-Ding/rt-thread:codex/fix-gd32-pwm-enable-channelCopy head branch name to clipboard