power: supply: smb5-lib: Disable type-C IRQs when locking power role

Locking current power roles before power role swap would generate a
series of type-C interrupts which are not expected from usbpd driver.
So disable type-C interrupts before locking the power role and
re-enable them before switching power roles.

Change-Id: Ia2d80a7b64113124928f75bb41f7daa5682db28c
Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>