cxgb4: update firmware to revision 1.20.8.0

Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>

WHENCE

@@ -577,14 +577,14 @@ Driver: cxgb4 - Chelsio Terminator 4/5/6 1/10/25/40/100G Ethernet adapter
 
 File: cxgb4/t4fw-1.14.4.0.bin
 File: cxgb4/t4fw-1.15.37.0.bin
-File: cxgb4/t4fw-1.19.1.0.bin
-Link: cxgb4/t4fw.bin -> t4fw-1.19.1.0.bin
+File: cxgb4/t4fw-1.20.8.0.bin
+Link: cxgb4/t4fw.bin -> t4fw-1.20.8.0.bin
 File: cxgb4/t5fw-1.14.4.0.bin
 File: cxgb4/t5fw-1.15.37.0.bin
-File: cxgb4/t5fw-1.19.1.0.bin
-Link: cxgb4/t5fw.bin -> t5fw-1.19.1.0.bin
-File: cxgb4/t6fw-1.19.1.0.bin
-Link: cxgb4/t6fw.bin -> t6fw-1.19.1.0.bin
+File: cxgb4/t5fw-1.20.8.0.bin
+Link: cxgb4/t5fw.bin -> t5fw-1.20.8.0.bin
+File: cxgb4/t6fw-1.20.8.0.bin
+Link: cxgb4/t6fw.bin -> t6fw-1.20.8.0.bin
 File: cxgb4/aq1202_fw.cld
 File: cxgb4/bcm8483.bin
 

cxgb4/t4fw.bin

-t4fw-1.19.1.0.bin
\ No newline at end of file
+t4fw-1.20.8.0.bin
\ No newline at end of file

cxgb4/t5fw.bin

-t5fw-1.19.1.0.bin
\ No newline at end of file
+t5fw-1.20.8.0.bin
\ No newline at end of file

cxgb4/t6fw.bin

-t6fw-1.19.1.0.bin
\ No newline at end of file
+t6fw-1.20.8.0.bin
\ No newline at end of file