soc/intel/apollolake: Simplify is-device-enabled checks

Simplify if-statements and use is_dev_enabled() where possible.

Change-Id: Ieeec987dc2bfe5bdef31882edbbb36e52f63b0e6
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43899
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Michael Niewöhner
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/soc/intel/apollolake/chip.c b/src/soc/intel/apollolake/chip.c
index b1b3ee8..d6e6187 100644
--- a/src/soc/intel/apollolake/chip.c
+++ b/src/soc/intel/apollolake/chip.c
@@ -554,7 +554,7 @@
 	}
 
 	dev = pcidev_path_on_root(SA_GLK_DEVFN_GMM);
-	silconfig->Gmm = dev ? dev->enabled : 0;
+	silconfig->Gmm = is_dev_enabled(dev);
 
 	/* On Geminilake, we need to override the default FSP PCIe de-emphasis
 	 * settings using the device tree settings. This is because PCIe
@@ -696,10 +696,7 @@
 	silconfig->VtdEnable = cfg->enable_vtd;
 
 	dev = pcidev_path_on_root(SA_DEVFN_IGD);
-	if (CONFIG(RUN_FSP_GOP) && dev && dev->enabled)
-		silconfig->PeiGraphicsPeimInit = 1;
-	else
-		silconfig->PeiGraphicsPeimInit = 0;
+	silconfig->PeiGraphicsPeimInit = CONFIG(RUN_FSP_GOP) && is_dev_enabled(dev);
 
 	mainboard_silicon_init_params(silconfig);
 }