staging: hikey9xx: phy-hi3670-usb3: hi3670_is_abbclk_seleted() returns bool

staging: hikey9xx: phy-hi3670-usb3: hi3670_is_abbclk_seleted() returns bool

There are a few issues on this function:

1. Instead of using 1/0 for true/false, change the type to boolean;
2. there's a typo there:
	seleted -> selected
3. It's logic is reversed.

Address them.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/a579004cfa0cb3cca55c2124a8574a7aeb4eacc3.1611052729.git.mchehab+huawei@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>