Kconfig: fix typos in CMD_BEDBUG description

Fix documentation bug reported by 'make refcheckdocs'.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 0e25762..a46c77d 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -2103,7 +2103,7 @@
 	help
 	  The bedbug (emBEDded deBUGger) command provides debugging features
 	  for some PowerPC processors. For details please see the
-	  docuemntation in doc/README.beddbug
+	  documentation in doc/README.bedbug.
 
 config CMD_DIAG
 	bool "diag - Board diagnostics"