ACPICA: iASL: Finish support for CSRT table.

Add intel-specific shared info subtable.  Add data table compiler
and template support.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

include/acpi/actbl2.h

@@ -261,9 +261,28 @@ struct acpi_csrt_group {
 	u16 subdevice_id;
 	u16 revision;
 	u16 reserved;
-	u32 info_length;
+	u32 shared_info_length;
 
-	/* Shared data (length = info_length) immediately follows */
+	/* Shared data immediately follows (Length = shared_info_length) */
+};
+
+/* Shared Info subtable */
+
+struct acpi_csrt_shared_info {
+	u16 major_version;
+	u16 minor_version;
+	u32 mmio_base_low;
+	u32 mmio_base_high;
+	u32 gsi_interrupt;
+	u8 interrupt_polarity;
+	u8 interrupt_mode;
+	u8 num_channels;
+	u8 dma_address_width;
+	u16 base_request_line;
+	u16 num_handshake_signals;
+	u32 max_block_size;
+
+	/* Resource descriptors immediately follow (Length = Group length - shared_info_length) */
 };
 
 /* Resource Descriptor subtable */