ec/purism: Fix CPU Turbo value (PPCM) set by the EC

The EC needs to set the PPCM value depending on whether
Turbo is enabled or not, and the values differ between
Broadwell (0, 1) and Skylake (1, 2) platforms.

Change-Id: I662dce54415e685c054ffc00b6afde0f1f7765e2
Signed-off-by: Youness Alaoui <youness.alaoui@puri.sm>
Reviewed-on: https://review.coreboot.org/25329
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>

src/ec/purism/librem/acpi/ec.asl

@@ -218,11 +218,11 @@ Device (EC)
 		 * when the system is charging.
 		 */
 		If (TURB) {
-			Store (Zero, PPCM)
+			Store (PPCM_TURBO, PPCM)
 			PPCN ()
 			Store (One, EDTB)
 		} Else {
-			Store (One, PPCM)
+			Store (PPCM_NOTURBO, PPCM)
 			PPCN ()
 			Store (Zero, EDTB)
 		}

src/mainboard/purism/librem13v1/acpi/ec.asl

@@ -14,5 +14,7 @@
  */
 
 #define EC_SCI_GPI 10
+#define PPCM_TURBO Zero
+#define PPCM_NOTURBO One
 
 #include <ec/purism/librem/acpi/ec.asl>

src/mainboard/purism/librem_skl/acpi/ec.asl

@@ -14,5 +14,7 @@
  */
 
 #define EC_SCI_GPI 0x50
+#define PPCM_TURBO One
+#define PPCM_NOTURBO 0x02
 
 #include <ec/purism/librem/acpi/ec.asl>