cnss2: Update board data file name format

If board ID is larger than 0xFF (e.g. 0xABCD), the proper BDF file
name format should be updated to bdwlanAB.bCD or bdwlanAB.eCD based
on corresponding BDF types.

Change-Id: I837c2a0e69221a9ab92d9d969641d3925716882f
Signed-off-by: Yue Ma <yuem@codeaurora.org>