ARM: uniphier: fix init page table for ProXstream2/PH1-LD6b USB boot

Currently, the USB boot mode is supported by an external loader and
U-boot proper image is put on the section 0.  This commit allows
access there.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>

arch/arm/mach-uniphier/init_page_table.S

 /*
- * Copyright (C) 2015 Panasonic Corporation
- * Copyright (C) 2015 Socionext Inc.
- *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
+ * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */
@@ -23,7 +21,7 @@
 ENTRY(init_page_table)
 	section = 0
 	.rept NR_SECTIONS
-	.if section == TEXT_SECTION || section == STACK_SECTION
+	.if section == 0 || section == 1 || section == STACK_SECTION
 	attr = NORMAL
 	.else
 	attr = DEVICE