everywhere: fix typos

Fix a lot of typos

Signed-off-by: Nazar Kazakov <nazar.kazakov.work@gmail.com>
diff --git a/scripts/gen_kobject_placeholders.py b/scripts/gen_kobject_placeholders.py
index f5d1e87..3cbad0a 100755
--- a/scripts/gen_kobject_placeholders.py
+++ b/scripts/gen_kobject_placeholders.py
@@ -115,7 +115,7 @@
     parser.add_argument("--outdir", required=True,
                         help="Output directory (<build_dir>/include/generated)")
     parser.add_argument("--datapct", required=True,
-                        help="Multipler to the size of reserved space for DATA region")
+                        help="Multiplier to the size of reserved space for DATA region")
     parser.add_argument("--rodata", required=True,
                         help="Extra bytes to reserve for RODATA region")
     parser.add_argument("-v", "--verbose", action="store_true",