linux-user/: fix some comment spelling errors

I found that there are many spelling errors in the comments of qemu,
so I used the spellcheck tool to check the spelling errors
and finally found some spelling errors in the linux-user folder.

Signed-off-by: zhaolichang <zhaolichang@huawei.com>
Reviewed-by: Alex Bennee <alex.bennee@linaro.org>
Message-Id: <20200917075029.313-7-zhaolichang@huawei.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
diff --git a/linux-user/flatload.c b/linux-user/flatload.c
index 8fb448f..14d2999 100644
--- a/linux-user/flatload.c
+++ b/linux-user/flatload.c
@@ -442,7 +442,7 @@
     indx_len = (indx_len + 15) & ~(abi_ulong)15;
 
     /*
-     * Alloate the address space.
+     * Allocate the address space.
      */
     probe_guest_base(bprm->filename, 0,
                      text_len + data_len + extra + indx_len);
@@ -794,7 +794,7 @@
 #error here
     for (i = MAX_SHARED_LIBS-1; i>0; i--) {
             if (libinfo[i].loaded) {
-                    /* Push previos first to call address */
+                    /* Push previous first to call address */
                     --sp;
                     if (put_user_ual(start_addr, sp))
                         return -EFAULT;