GPIO abstraction for power and host control

In libopenbmc_intf/power_gpio.c there are GPIO abstractions for power
related GPIOs.
Host control related GPIOs need to do the same abstraction.

The changes include:
1. Add host control related GPIOs in gpio_configs and update
system_manager.py
2. Update control_host_obj.c to use the abstracted GPIOs
3. Update GPIO_CONFIGS for all machines and add host control related
GPIOs

power_gpio will be renamed to gpio_configs in next commit;

Resolves openbmc/openbmc#814

Change-Id: I7832065d495d7d64c5df2f5b177005b97e68900a
Signed-off-by: Lei YU <mine260309@gmail.com>
diff --git a/configs/Barreleye.py b/configs/Barreleye.py
index e8e8d57..ac1902f 100644
--- a/configs/Barreleye.py
+++ b/configs/Barreleye.py
@@ -557,18 +557,30 @@
 	},
 }
 
-POWER_CONFIG = {
-    'power_good_in': 'PGOOD',
-    'power_up_outs': [
-        ('POWER_PIN', False),
-    ],
-    'reset_outs': [
-        ('USB_RESET', False),
-    ],
-    'pci_reset_outs': [
-        # net name, polarity, reset hold
-        ('PCIE_RESET', False, False),
-    ],
+GPIO_CONFIGS = {
+    'power_config' : {
+        'power_good_in' : 'PGOOD',
+        'power_up_outs' : [
+            ('POWER_PIN', False),
+        ],
+        'reset_outs' : [
+            ('USB_RESET', False),
+        ],
+        'pci_reset_outs': [
+            # net name, polarity, reset hold
+            ('PCIE_RESET', False, False),
+        ],
+    },
+    'hostctl_config' : {
+        'fsi_data' : 'FSI_DATA',
+        'fsi_clk' : 'FSI_CLK',
+        'fsi_enable' : 'FSI_ENABLE',
+        'cronus_sel' : 'CRONUS_SEL',
+        'optionals' : [
+            ('BMC_THROTTLE', True),
+            ('IDBTN', False),
+        ],
+    },
 }
 
 # Miscellaneous non-poll sensor with system specific properties.