MAINTAINERS: Add Tom Rix as fpga reviewer

I take care of fpga kernel and userspace for Red Hat and would
like help out more with the mainline kernel.
Signed-off-by: Tom Rix <trix@redhat.com>
Acked-by: Wu Hao <hao.wu@intel.com>
Signed-off-by: Moritz Fischer <mdf@kernel.org>

MAINTAINERS

@@ -6811,6 +6811,7 @@ F:	drivers/net/ethernet/nvidia/*
 
 FPGA DFL DRIVERS
 M:	Wu Hao <hao.wu@intel.com>
+R:	Tom Rix <trix@redhat.com>
 L:	linux-fpga@vger.kernel.org
 S:	Maintained
 F:	Documentation/fpga/dfl.rst
@@ -6819,6 +6820,7 @@ F:	include/uapi/linux/fpga-dfl.h
 
 FPGA MANAGER FRAMEWORK
 M:	Moritz Fischer <mdf@kernel.org>
+R:	Tom Rix <trix@redhat.com>
 L:	linux-fpga@vger.kernel.org
 S:	Maintained
 W:	http://www.rocketboards.org