cnss2: Extend idle restart timeout

WLAN driver has its own watchdog timer for idle restart, so
extend idle restart timeout in platform driver to avoid timing
out before WLAN driver.

Change-Id: I4bab19fce7b30c59e9ecc0f0a8923a3693fdec12
Signed-off-by: Yue Ma <yuem@codeaurora.org>