soc: qcom: bgcom: disable/enable interrupt on device suspend/resume

BG interrupts serviced only if device is in resume state. BG
interrupt is disabled in suspend and enabled on device resume.

Change-Id: Ifd69c19c4f96351663ac9844d1f71514d8402ec4
Signed-off-by: Arjun Singh <arsingh@codeaurora.org>