cnss: remove dummy code to reduce the device initialization latency

The cnss PCIe platform driver is using GPIO library API instead of
PINCTRL framework for the pin control in device probe, remove,
suspend and resume state.

The GPIO can be configured by either using GPIO library or PINCTRL
framework, No need to request the same GPIO in device probe by using
both GPIO library and PINCTRL framework.

To improve the device initialization time remove this duplicate code
from the platform driver.

CRs-Fixed: 1111859
Change-Id: I14406ed55c298460f0e47d20a5353a107d08afda
Signed-off-by: Sarada Prasanna Garnayak <sgarna@codeaurora.org>