Bluetooth: Add symbolic links for Intel Solar JfP2/1 firmware variants

Different variants of the Intel Solar JfP2/1 Bluetooth controller use the same
firmware file name.

Create symbolic links to the common firmware files instead of duplicating
them. This reduces firmware storage space on the filesystem.

Signed-off-by: Kiran K <kiran.k@intel.com>

WHENCE

@@ -4266,10 +4266,10 @@ File: intel/ibt-0040-1020.sfi
 File: intel/ibt-0040-1020.ddc
 File: intel/ibt-1040-1020.sfi
 File: intel/ibt-1040-1020.ddc
-File: intel/ibt-0040-2120.sfi
-File: intel/ibt-0040-2120.ddc
-File: intel/ibt-1040-2120.sfi
-File: intel/ibt-1040-2120.ddc
+Link: intel/ibt-0040-2120.sfi -> ibt-0040-1020.sfi
+Link: intel/ibt-0040-2120.ddc -> ibt-0040-1020.ddc
+Link: intel/ibt-1040-2120.sfi -> ibt-1040-1020.sfi
+Link: intel/ibt-1040-2120.ddc -> ibt-1040-1020.ddc
 Version: BT_SolarJfp_REL151_22.180.2405.151
 
 File: intel/ibt-0093-0041.sfi