gpiolib: fix hogs with multiple lines

gpiolib: fix hogs with multiple lines

After moving GPIO hog handling into GPIOLIB core, we accidentally stopped
supporting devicetree hog definitions with multiple lines like so:

	hog {
		gpio-hog;
		gpios = <3 0>, <4 GPIO_ACTIVE_LOW>;
		output-high;
		line-name = "foo";
	};

Restore this functionality to fix reported regressions.

Fixes: d1d564ec4992 ("gpio: move hogs into GPIO core")
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Closes: https://lore.kernel.org/all/CAMuHMdX6RuZXAozrF5m625ZepJTVVr4pcyKczSk12MedWvoejw@mail.gmail.com/
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260330-gpio-hogs-multiple-v3-1-175c3839ad9f@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>