mb/google/bluey: Enable PCIE Feature for bluey

Enable PCIE init for bluey board and update device pci node.
Remove unused pci 4.0 node(WLAN).

TEST= Verified that link is enumerated and NVMe is accessible via PCIE.

Change-Id: I7ad4a9409ff0465b45b8bb1f3e005bf9f83f2c42
Signed-off-by: Hari L <haril@qualcomm.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/88535
Reviewed-by: Subrata Banik <subratabanik@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/bluey/devicetree.cb

@@ -3,7 +3,6 @@
 chip soc/qualcomm/x1p42100
 	device cpu_cluster 0 on end
 	device domain 0 on
-		device pci 04.0 on end # WLAN
-		device pci 06.0 on end # SSD
+		device pci 00.0 on end # Root Bridge
 	end
 end

src/mainboard/google/bluey/mainboard.c

@@ -11,8 +11,7 @@
 
 bool mainboard_needs_pcie_init(void)
 {
-	/* Placeholder */
-	return false;
+	return true;
 }
 
 static void display_startup(void)