char: rename qemu_chr_write() -> qemu_chr_fe_write()

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/hw/grlib_apbuart.c b/hw/grlib_apbuart.c
index 169a56e..c90b810 100644
--- a/hw/grlib_apbuart.c
+++ b/hw/grlib_apbuart.c
@@ -114,7 +114,7 @@
     switch (addr) {
     case DATA_OFFSET:
         c = value & 0xFF;
-        qemu_chr_write(uart->chr, &c, 1);
+        qemu_chr_fe_write(uart->chr, &c, 1);
         return;
 
     case STATUS_OFFSET: