Convert ISO-8859 files to UTF-8

There was a mix of UTF-8 and ISO-8859 files in the U-Boot source
tree, which could cause issues with the patchwork review system.
This commit converts all ISO-8859 files to UTF-8.

Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
diff --git a/doc/README.RPXClassic b/doc/README.RPXClassic
index 5344cc6..e03f670 100644
--- a/doc/README.RPXClassic
+++ b/doc/README.RPXClassic
@@ -1,7 +1,7 @@
 # Porting U-Boot onto RPXClassic LF_BW31 board
 # Written by Pierre AUBERT
 # E-Mail  p.aubert@staubli.com
-# Stäubli Faverges - <www.staubli.com>
+# Stäubli Faverges - <www.staubli.com>
 #
 # Sept. 20 2001
 #
diff --git a/doc/README.m5373evb b/doc/README.m5373evb
index e90a320..6216671 100644
--- a/doc/README.m5373evb
+++ b/doc/README.m5373evb
@@ -279,7 +279,7 @@
 NET: Registered protocol family 2
 IP route cache hash table entries: 1024 (order: 0, 4096 bytes) TCP established hash table entries: 1024 (order: 1, 8192 bytes) TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
 TCP: Hash tables configured (established 1024 bind 1024) TCP reno registered
-JFFS2 version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
+JFFS2 version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
 io scheduler noop registered
 io scheduler cfq registered (default)
 ColdFire internal UART serial driver version 1.00 ttyS0 at 0xfc060000 (irq = 90) is a builtin ColdFire UART
diff --git a/doc/README.mpc7448hpc2 b/doc/README.mpc7448hpc2
index 8659e83..cbb043e 100644
--- a/doc/README.mpc7448hpc2
+++ b/doc/README.mpc7448hpc2
@@ -8,7 +8,7 @@
 the memory, disk drive and Ethernet port subsystems.
 
 MPC7448hpc2(Taiga) is designed to the micro-ATX chassis, allowing it to be
-used in 1U or 2U rack-mount chassis¡¯, as well as in standard ATX/Micro-ATX
+used in 1U or 2U rack-mount chassis¡¯, as well as in standard ATX/Micro-ATX
 chassis.
 
 Building U-Boot