Make OpenOCD configs -quiet again and update the readme with a note

The new version of OpenOCD doesn't print the success message anyway even with -quiet removed, it just spams the terminal a lot.

README.md

@@ -78,3 +78,4 @@ Make CPLD programming shell scripts executable:
 
 Run the FPGA update with:
 `sudo ./nprog.sh` or `sudo ./nprog_240.sh` if you are using a Rev. B EPM240 PiStorm board.
+If no fatal error messages are printed on screen and you see a message saying `shutdown command invoked`, this means that the CPLD has been programmed successfully.

nprog/68_240.cfg

@@ -28,6 +28,6 @@ reset_config srst_only srst_open_drain
 transport select jtag
 jtag newtap max2 tap -irlen 11 -expected-id 0x020a20dd
 init
-svf ./rtl/EPM240_bitstream.svf
+svf ./rtl/EPM240_bitstream.svf -quiet
 sleep 200
 shutdown

nprog/68new.cfg

@@ -28,6 +28,6 @@ reset_config srst_only srst_open_drain
 transport select jtag
 jtag newtap max2 tap -irlen 11 -expected-id 0x020a20dd
 init
-svf ./rtl/bitstream.svf
+svf ./rtl/bitstream.svf -quiet
 sleep 200
 shutdown

nprog/68old.cfg

@@ -33,6 +33,6 @@ reset_config srst_only srst_open_drain
 transport select jtag
 jtag newtap max2 tap -irlen 11 -expected-id 0x020a20dd 
 init
-svf ./rtl/bitstream.svf
+svf ./rtl/bitstream.svf -quiet
 sleep 200
 shutdown