tpm/acpi/tpm.asl: Only include tpm.asl if tpm is enabled

If the TPM code isn't getting built in, the Kconfig symbol
CONFIG_TPM_TIS_BASE_ADDRESS doesn't exist.  This ends up creating
an invalid operating region in the ACPI tables, causing a bluescreen
in windows.

This should fix this issue:
https://ticket.coreboot.org/issues/35
"commit 85a255fb (acpi/tpm: Gracefully handle missing TPM module)
breaks Windows"

Change-Id: I32e0e09c1f61551a40f4842168f556d5e1940d28
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/13890
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/drivers/pc80/tpm/acpi/tpm.asl

@@ -15,6 +15,8 @@
 
 /* Trusted Platform Module */
 
+#if CONFIG_LPC_TPM
+
 Device (TPM)
 {
 	Name (_HID, EISAID ("PNP0C31"))
@@ -41,7 +43,7 @@ Device (TPM)
 
 	Method (_STA, 0)
 	{
-#if CONFIG_LPC_TPM && !CONFIG_TPM_DEACTIVATE
+#if !CONFIG_TPM_DEACTIVATE
 		If (LAnd (LGreater (DVID, 0), LLess (DVID, 0xffffffff))) {
 			Return (0xf)
 		} Else {
@@ -213,3 +215,5 @@ Device (TPM)
 		Return (Buffer (1) { 0 })
 	}
 }
+
+#endif /* CONFIG_LPC_TPM */