[PATCH] powerpc: powermac adb fix dependency on btext_drawchar

udbg_adb_init() has become dependent on btext_drawchar, even when
BOOTX_TEXT support is not selected.  This leads to the error below.
Make the check dependant on BOOTX_TEXT.

      LD      .tmp_vmlinux1
    arch/powerpc/platforms/built-in.o(.toc1+0xa40): undefined
					reference to `btext_drawchar'
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/platforms/powermac/udbg_adb.c

@@ -171,9 +171,12 @@ int udbg_adb_init(int force_btext)
 	udbg_adb_old_getc_poll = udbg_getc_poll;
 
 	/* Check if our early init was already called */
-	if (udbg_adb_old_putc == udbg_adb_putc ||
-	    udbg_adb_old_putc == btext_drawchar)
+	if (udbg_adb_old_putc == udbg_adb_putc)
 		udbg_adb_old_putc = NULL;
+#ifdef CONFIG_BOOTX_TEXT
+	if (udbg_adb_old_putc == btext_drawchar)
+		udbg_adb_old_putc = NULL;
+#endif
 
 	/* Set ours as output */
 	udbg_putc = udbg_adb_putc;