pld: add support for cologne chip gatemate fpgas

Change-Id: I0bf5a52ee6a7f0287524619114eba0cfccf6ac81
Signed-off-by: Daniel Anselmi <danselmi@gmx.ch>
Reviewed-on: https://review.openocd.org/c/openocd/+/7565
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>

src/pld/Makefile.am

@@ -6,6 +6,7 @@ noinst_LTLIBRARIES += %D%/libpld.la
 	%D%/ecp2_3.c \
 	%D%/ecp5.c \
 	%D%/efinix.c \
+	%D%/gatemate.c \
 	%D%/gowin.c \
 	%D%/intel.c \
 	%D%/lattice.c \