wcnss: Add interface to Reset wcnss

Add wcnss reset interface, this interface generates an FIQ to Riva.
Upon receiving this interrupt, Riva will execute the ERR_FATAL
routine and invoke SSR.

CRs-fixed: 411579
Signed-off-by: Sameer Thalappil <sameert@codeaurora.org>

Conflicts:

	drivers/net/wireless/wcnss/wcnss_wlan.c

Signed-off-by: Sameer Thalappil <sameert@codeaurora.org>
(cherry picked from commit 098dfa7fea4431b6f93eda4badee7bc0649fe2df)

Conflicts:

	drivers/net/wireless/wcnss/wcnss_wlan.c
	include/linux/wcnss_wlan.h

Change-Id: I034bc2a2817e25c0d9ce663db84652122e8f0ef2
Signed-off-by: Ramakrishna Prasad N <crpn@codeaurora.org>

Conflicts:

	drivers/net/wireless/wcnss/wcnss_wlan.c
	include/linux/wcnss_wlan.h

Signed-off-by: Shruthi Krishna <skrish@codeaurora.org>