fpga: Convert SYS_FPGA_CHECK_CTRLC to Kconfig

After commit 8cca60a2cb ("Kconfig: Remove some symbols from the
whitelist") downstream builds failed for boards setting this in
include/configs/…

Signed-off-by: Alexander Dahl <ada@thorsis.com>
Link: https://lore.kernel.org/r/20220721133122.32428-2-ada@thorsis.com
Signed-off-by: Michal Simek <michal.simek@amd.com>

README

@@ -1346,9 +1346,6 @@ The following options need to be configured:
 		If defined, a function that provides delays in the FPGA
 		configuration driver.
 
-		CONFIG_SYS_FPGA_CHECK_CTRLC
-		Allow Control-C to interrupt FPGA configuration
-
 		CONFIG_SYS_FPGA_CHECK_ERROR
 
 		Check for configuration errors during FPGA bitfile

drivers/fpga/Kconfig

@@ -91,4 +91,10 @@ config FPGA_ZYNQPL
 	  Enable FPGA driver for loading bitstream in BIT and BIN format
 	  on Xilinx Zynq devices.
 
+config SYS_FPGA_CHECK_CTRLC
+	bool "Allow Control-C to interrupt FPGA configuration"
+	depends on FPGA
+	help
+	  User can interrupt FPGA configuration by pressing CTRL+C.
+
 endmenu

drivers/fpga/virtex2.c

@@ -45,13 +45,6 @@
 #define CONFIG_SYS_FPGA_PROG_FEEDBACK
 #endif
 
-/*
- * Don't allow config cycle to be interrupted
- */
-#ifndef CONFIG_SYS_FPGA_CHECK_CTRLC
-#undef CONFIG_SYS_FPGA_CHECK_CTRLC
-#endif
-
 /*
  * Check for errors during configuration by default
  */