Remove old Broadcom Everest (bnx2x) v4/5 firmware

They're not supported in any of the current stable releases
and the driver loads firmware from the bnx2x directory.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>

WHENCE

@@ -1485,12 +1485,6 @@ Found in hex form in kernel source.
 
 Driver: bnx2x: Broadcom Everest
 
-File: bnx2x-e1-4.8.53.0.fw
-File: bnx2x-e1h-4.8.53.0.fw
-File: bnx2x-e1-5.2.7.0.fw
-File: bnx2x-e1h-5.2.7.0.fw
-File: bnx2x-e1-5.2.13.0.fw
-File: bnx2x-e1h-5.2.13.0.fw
 File: bnx2x/bnx2x-e1-6.0.34.0.fw
 File: bnx2x/bnx2x-e1h-6.0.34.0.fw
 File: bnx2x/bnx2x-e2-6.0.34.0.fw