src: add IS_ENABLED() around Kconfig symbol references

These are places that were missed on the first pass.

Change-Id: Ia6511f0325433ab020946078923bf7ad6f0362a3
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/20358
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

src/arch/x86/pci_ops_conf1.c

@@ -20,7 +20,7 @@
  * Functions for accessing PCI configuration space with type 1 accesses
  */
 
-#if !CONFIG_PCI_IO_CFG_EXT
+#if !IS_ENABLED(CONFIG_PCI_IO_CFG_EXT)
 #define CONFIG_CMD(bus, devfn, where)	(0x80000000 | (bus << 16) | \
 					(devfn << 8) | (where & ~3))
 #else

src/arch/x86/smbios.c

@@ -278,7 +278,7 @@ static int smbios_write_type0(unsigned long *current, int handle)
 	t->length = len - 2;
 
 	t->vendor = smbios_add_string(t->eos, "coreboot");
-#if !CONFIG_CHROMEOS
+#if !IS_ENABLED(CONFIG_CHROMEOS)
 	t->bios_release_date = smbios_add_string(t->eos, coreboot_dmi_date);
 
 	t->bios_version = smbios_add_string(t->eos,

src/console/vtxprintf.c

@@ -21,7 +21,7 @@
 
 #define call_tx(x) tx_byte(x, data)
 
-#if !CONFIG_ARCH_MIPS
+#if !IS_ENABLED(CONFIG_ARCH_MIPS)
 #define SUPPORT_64BIT_INTS
 #endif