ARM: dts: socfpga: Keep FPGA bridge entries in SPL DT

Keep the FPGA bridge entries in SPL DT to let do_bridge_reset() toggle
the bridges on/off as needed according to the handoff file.
Signed-off-by: NMarek Vasut <marex@denx.de>
Cc: Chin Liang See <chin.liang.see@intel.com>
Cc: Dinh Nguyen <dinguyen@kernel.org>
Cc: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Cc: Tien Fong Chee <tien.fong.chee@intel.com>

arch/arm/dts/socfpga_arria10_handoff_u-boot.dtsi

@@ -64,4 +64,28 @@
 			u-boot,dm-pre-reloc;
 		};
 	};
+
+	fpgabridge@0 {
+		u-boot,dm-pre-reloc;
+	};
+
+	fpgabridge@1 {
+		u-boot,dm-pre-reloc;
+	};
+
+	fpgabridge@2 {
+		u-boot,dm-pre-reloc;
+	};
+
+	fpgabridge@3 {
+		u-boot,dm-pre-reloc;
+	};
+
+	fpgabridge@4 {
+		u-boot,dm-pre-reloc;
+	};
+
+	fpgabridge@5 {
+		u-boot,dm-pre-reloc;
+	};
 };