global: Migrate CONFIG_FPGA_DELAY to CFG

Perform a simple rename of CONFIG_FPGA_DELAY to CFG_FPGA_DELAY

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/README b/README
index a278825..8408676 100644
--- a/README
+++ b/README
@@ -1018,7 +1018,7 @@
 		will require a board or device specific function to
 		be written.
 
-		CONFIG_FPGA_DELAY
+		CFG_FPGA_DELAY
 
 		If defined, a function that provides delays in the FPGA
 		configuration driver.