soc/amd/stoneyridge/include/soc/smi.h: Fix name collision

When smi.h is included to southbridge.h (to use SCI/SMI definitions within
southbridge.h definitions), this causes a collision of the definition of NONE
(ioapic.h also has a NONE definition). As NONE is an enumeration of interrupt
types (SCI/SMI), add INTERRUPT_ at the start of each definition.

This is preparation to have GPIO table/code also declare/program SCI/SMI.

BUG=b:72875858
TEST=Build grunt.

Change-Id: I5c7b798f9f4d7c2a9f9c606c7ebffb7004a37b99
Signed-off-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-on: https://review.coreboot.org/25845
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/stoneyridge/include/soc/smi.h

@@ -201,10 +201,10 @@ enum smi_mode {
 };
 
 enum smi_sci_type {
-	NONE,
-	SCI,
-	SMI,
-	BOTH,
+	INTERRUPT_NONE,
+	INTERRUPT_SCI,
+	INTERRUPT_SMI,
+	INTERRUPT_BOTH,
 };
 
 enum smi_sci_lvl {