plat: intel: Add FPGAINTF configuration to when configuring pinmux

FPGAINTF wasn't enabled when configuring pinmux. This fixes the issue.

Signed-off-by: Tien Hock Loh <tien.hock.loh@intel.com>
Change-Id: I5a6aacd504901b8f7327b2f4854b8a77d0c37019
diff --git a/plat/intel/soc/common/include/socfpga_system_manager.h b/plat/intel/soc/common/include/socfpga_system_manager.h
index 93aa846..8b42d47 100644
--- a/plat/intel/soc/common/include/socfpga_system_manager.h
+++ b/plat/intel/soc/common/include/socfpga_system_manager.h
@@ -13,6 +13,8 @@
 
 #define SOCFPGA_SYSMGR_SDMMC				0x28
 
+#define SOCFPGA_SYSMGR_FPGAINTF_EN_2			0x6c
+
 #define SOCFPGA_SYSMGR_EMAC_0				0x44
 #define SOCFPGA_SYSMGR_EMAC_1				0x48
 #define SOCFPGA_SYSMGR_EMAC_2				0x4c