wlan: Increase NV download waiting time of host driver during SSR

Currently  host driver will wait 5 seconds for NV download. In some cases
NV download may  need more time to complete during SSR, so increase the
timeout to 10 seconds.

Change-Id: Ie541add32bc63e7868ae9acf48356f8402a5d082
CRs-Fixed: 623092
wlan: Add parameter to set management frame rate in 2.4Gh

Add gDefaultRateIndex24Ghz param in .ini to change
WNI_CFG_DEFAULT_RATE_INDEX_24GHZ  of cfg.dat, used to set
management frame rate in 2.4Gh.

gDefaultRateIndex24Ghz   Rate(MBPS)
1                         1
2                         2
3                         5.5
4                         11
5                         6
6                         12
7                         24

Change-Id: Ic9987ca3b4fe7c395c69755beb75cc7c5a45509b
CRs-Fixed: 616045
wlan: Revision 3.2.3.254

Revision   3.2.3.254

Change-Id: I907d2d2e5d8f46dcfbda446ae8dfe2348d4a8c10