cnss2: Fix 60s timeout while search regdb.bin failure

Since for the Genoa or the SP that doesn't need
regdb.bin for Hasting, it should happen search
regdb.bin failure issue that cause 60s timeout.
So add one compile macro CNSS_REQ_FW_DIRECT to
replace request_firmware_direct with request_
firmware for regdb.bin and only search the folder
that set by fw_path, which can avoid 60s timeout
while search file failure in the user space.
static const char * const fw_path[] = {
	fw_path_para,
	"/lib/firmware/updates/" UTS_RELEASE,
	"/lib/firmware/updates",
	"/lib/firmware/" UTS_RELEASE,
	"/lib/firmware"
};
Above piece of code is the definition of fw_path
from drivers/base/firmware_loader/main.c.

Change-Id: I79c2fce33a8befecb0242a70b7eee1eef9a76e9b
Signed-off-by: Chaoli Zhou <zchaoli@codeaurora.org>
Signed-off-by: Kuichu Ni <kuichun@codeaurora.org>