ath10k: Add host capability indication flag in wmi ready cmd

Add the host capability indication flags in the wmi ready command,
to let firmware to know the features supported by the host driver.

Change-Id: I0c07fb371e474995cb00f51bfe0eea4f46ab4223
Signed-off-by: Surabhi Vishnoi <svishnoi@codeaurora.org>