x86: Drop use of CONFIG_REALMODE_DEBUG

This option is not actually defined in Kconfig anymore. Use a normal
debug print instead, which has a similar effect.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/x86/lib/bios_interrupts.c b/arch/x86/lib/bios_interrupts.c
index 3ae6c19..e0c2284 100644
--- a/arch/x86/lib/bios_interrupts.c
+++ b/arch/x86/lib/bios_interrupts.c
@@ -200,10 +200,8 @@
 			dm_pci_write_config32(dev, reg, dword);
 			break;
 		}
-#ifdef CONFIG_REALMODE_DEBUG
-		debug("0x%x: bus %d devfn 0x%x reg 0x%x val 0x%x\n", func,
-		      bus, devfn, reg, M.x86.R_ECX);
-#endif
+		log_debug("0x%x: bus %d devfn 0x%x reg 0x%x val 0x%x\n", func,
+			  bus, devfn, reg, M.x86.R_ECX);
 		M.x86.R_EAX &= 0xffff00ff; /* Clear AH */
 		M.x86.R_EAX |= PCIBIOS_SUCCESSFUL;
 		retval = 1;