usb: dwc3-uniphier: replace <common.h> with <linux/bitops.h>

Including <common.h> pulls in a lot of bloat.  What this driver needs
is BIT(), so replace it with <linux/bitops.h>

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Marek Vasut <marex@denx.de>