mb/google/skyrim: Delete PSPP TODO

Because Mendocino doesn't support PCIe Gen4, PSPP on this platform does
not save any power, so leave it disabled.

BUG=273889287
TEST=None
BRANCH=skyrim

Signed-off-by: Martin Roth <gaumless@gmail.com>
Change-Id: I1a1c6692cd0a44469a35582042b92eeec31073fa
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73826
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
diff --git a/src/mainboard/google/skyrim/variants/baseboard/devicetree.cb b/src/mainboard/google/skyrim/variants/baseboard/devicetree.cb
index 6892742..202ab26 100644
--- a/src/mainboard/google/skyrim/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/skyrim/variants/baseboard/devicetree.cb
@@ -79,7 +79,8 @@
 	register "gpp_clk_config[2]" = "GPP_CLK_REQ"
 	register "gpp_clk_config[3]" = "GPP_CLK_OFF"
 
-	register "pspp_policy" = "DXIO_PSPP_DISABLED" # TODO: reenable when PSPP works
+	# PSPP doesn't save any power on this platform
+	register "pspp_policy" = "DXIO_PSPP_DISABLED"
 
 	register "s0ix_enable" = "true"