acpi: Hide Chrome and coreboot specific devices

Some ACPI interfaces introduced by Chrome or coreboot do not
need drivers outside ChromeOS, for example Chrome EC or
coreboot table; or will be probed by direct ACPI calls (instead
of trying to find drivers by device IDs).

These interfaces should be set to hidden so non-ChromeOS systems,
for example Windows, won't have problem finding driver.

Interfaces changed:
- coreboot (BOOT0000), only used by Chrome OS / Linux kernel.
- Chrome OS EC
- Chrome OS EC PD
- Chrome OS TBMC
- Chrome OS RAMoops

BUG=b:72200466
BRANCH=eve
TEST=Boot into non-ChromeOS systems (for example Windows)
     and checked ACPI devices on UI.

Change-Id: I9786cf9ee07b2c3f11509850604f2bfb3f3e710a
Signed-off-by: David Wu <David_Wu@quanta.corp-partner.google.com>
Reviewed-on: https://chromium-review.googlesource.com/1078211
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Commit-Queue: Hung-Te Lin <hungte@chromium.org>
Tested-by: Hung-Te Lin <hungte@chromium.org>
Trybot-Ready: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://review.coreboot.org/28333
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/ec/google/chromeec/acpi/cros_ec.asl

@@ -39,4 +39,8 @@ Device (CREC)
 		Name (_DDN, "EC Base Switch Device")
 	}
 #endif
+	Method(_STA, 0)
+	{
+		Return (0xB)
+	}
 }

src/ec/google/chromeec/acpi/pd.asl

@@ -18,4 +18,8 @@ Device (ECPD)
 	Name (_HID, "GOOG0003")
 	Name (_UID, 1)
 	Name (_DDN, "EC PD Device")
+	Method(_STA, 0)
+	{
+		Return (0xB)
+	}
 }

src/ec/google/chromeec/acpi/tbmc.asl

@@ -26,4 +26,8 @@ Device (TBMC)
 			Return (0x0)
 		}
 	}
+	Method(_STA, 0)
+	{
+		Return (0xB)
+	}
 }