Corrected the definitions of the pull-up and pull-down configurations

in defs.h, per the github issue #15 on caravel (where the error was
previously;  the error has since migrated to caravel_mgmt_soc_litex).

Author: RTimothyEdwards

verilog/dv/firmware/defs.h

@@ -223,15 +223,15 @@ extern uint32_t flashio_worker_end;
 
 // Useful GPIO mode values
 #define GPIO_MODE_MGMT_STD_INPUT_NOPULL    0x0403
-#define GPIO_MODE_MGMT_STD_INPUT_PULLDOWN  0x0803
-#define GPIO_MODE_MGMT_STD_INPUT_PULLUP	   0x0c03
+#define GPIO_MODE_MGMT_STD_INPUT_PULLDOWN  0x0801
+#define GPIO_MODE_MGMT_STD_INPUT_PULLUP	   0x0c01
 #define GPIO_MODE_MGMT_STD_OUTPUT	   0x1809
 #define GPIO_MODE_MGMT_STD_BIDIRECTIONAL   0x1801
 #define GPIO_MODE_MGMT_STD_ANALOG   	   0x000b
 
 #define GPIO_MODE_USER_STD_INPUT_NOPULL	   0x0402
-#define GPIO_MODE_USER_STD_INPUT_PULLDOWN  0x0802
-#define GPIO_MODE_USER_STD_INPUT_PULLUP	   0x0c02
+#define GPIO_MODE_USER_STD_INPUT_PULLDOWN  0x0800
+#define GPIO_MODE_USER_STD_INPUT_PULLUP	   0x0c00
 #define GPIO_MODE_USER_STD_OUTPUT	   0x1808
 #define GPIO_MODE_USER_STD_BIDIRECTIONAL   0x1800
 #define GPIO_MODE_USER_STD_OUT_MONITORED   0x1802