libpayload: Make Kconfig bools use IS_ENABLED()

This will make the code work with the different styles
of Kconfig (emit unset bools vs don't emit unset bools)

Roughly, the patch does this, and a little bit of fixing up:

perl -pi -e 's,ifdef (CONFIG_LP_.+?)\b,if IS_ENABLED\($1\),g' `find . -name *.[ch]`
perl -pi -e 's,ifndef (CONFIG_LP_.+?)\b,if !IS_ENABLED\($1\),g' `find . -name *.[ch]`

Change-Id: Ib8a839b056a1f806a8597052e1b571ea3d18a79f
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: http://review.coreboot.org/10711
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/payloads/libpayload/curses/pdcurses-backend/pdckbd.c b/payloads/libpayload/curses/pdcurses-backend/pdckbd.c
index d1061b2..c872262 100644
--- a/payloads/libpayload/curses/pdcurses-backend/pdckbd.c
+++ b/payloads/libpayload/curses/pdcurses-backend/pdckbd.c
@@ -5,7 +5,7 @@
 
 unsigned long pdc_key_modifiers = 0L;
 
-#ifdef CONFIG_LP_SERIAL_CONSOLE
+#if IS_ENABLED(CONFIG_LP_SERIAL_CONSOLE)
 /* We treat serial like a vt100 terminal.  For now we
    do the cooking in here, but we should probably eventually
    pass it to dedicated vt100 code */
@@ -108,7 +108,7 @@
 
 bool PDC_check_key(void)
 {
-#ifdef CONFIG_LP_USB_HID
+#if IS_ENABLED(CONFIG_LP_USB_HID)
     usb_poll();
     if ((curses_flags & F_ENABLE_CONSOLE) &&
         usbhid_havechar()) {
@@ -116,14 +116,14 @@
     }
 #endif
 
-#ifdef CONFIG_LP_PC_KEYBOARD
+#if IS_ENABLED(CONFIG_LP_PC_KEYBOARD)
     if ((curses_flags & F_ENABLE_CONSOLE) &&
         keyboard_havechar()) {
         return TRUE;
     }
 #endif
 
-#ifdef CONFIG_LP_SERIAL_CONSOLE
+#if IS_ENABLED(CONFIG_LP_SERIAL_CONSOLE)
     if ((curses_flags & F_ENABLE_SERIAL) &&
         serial_havechar()) {
         return TRUE;
@@ -139,7 +139,7 @@
 {
     int c = 0;
 
-#ifdef CONFIG_LP_USB_HID
+#if IS_ENABLED(CONFIG_LP_USB_HID)
     usb_poll();
     if ((curses_flags & F_ENABLE_CONSOLE) &&
         usbhid_havechar()) {
@@ -147,14 +147,14 @@
     }
 #endif
 
-#ifdef CONFIG_LP_PC_KEYBOARD
+#if IS_ENABLED(CONFIG_LP_PC_KEYBOARD)
     if ((curses_flags & F_ENABLE_CONSOLE) &&
         keyboard_havechar() && (c==0)) {
         c = keyboard_getchar();
     }
 #endif
 
-#ifdef CONFIG_LP_SERIAL_CONSOLE
+#if IS_ENABLED(CONFIG_LP_SERIAL_CONSOLE)
     if ((curses_flags & F_ENABLE_SERIAL) &&
         serial_havechar() && (c==0)) {
         c = cook_serial(serial_getchar());