[PATCH] pinctrl: single: Fix potential division by zero

[Tony Lindgren]

* Maxim Korotkov <korotkov.maxim.s at gmail.com> [221117 12:22]:
> There is a possibility of dividing by zero due to the pcs->bits_per_pin
> if pcs->fmask() also has a value of zero and called fls
> from asm-generic/bitops/builtin-fls.h or arch/x86/include/asm/bitops.h.
> The function pcs_probe() has the branch that assigned to fmask 0 before
> pcs_allocate_pin_table() was called

Reviewed-by: Tony Lindgren <tony at atomide.com>