cnss2: set high 32bit of MSI addr only when device is 64 bit capable

If EP is 32bit MSI capable, then MSI address is 4 bytes. Platform
driver check MSI capability before read MSI address.

Change-Id: I8157b7ba2c9ed2a8d93f168f893cf1a2e6bb50b6
Signed-off-by: Kai Liu <kaliu@codeaurora.org>