Fix two occurrences where 'signing' is misspelled.
Signed-off-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Tim Harvey <tharvey@gateworks.com>
1.4 Signing the U-Boot binary
------------------------------
-The CST tool is used for singing the U-Boot binary and generating a CSF binary,
+The CST tool is used for signing the U-Boot binary and generating a CSF binary,
users should input the CSF description file created in the step above and
should receive a CSF binary, which contains the CSF commands, SRK table,
signatures and certificates.
1.4 Signing the images
-----------------------
-The CST tool is used for singing the U-Boot binary and generating a CSF binary,
+The CST tool is used for signing the U-Boot binary and generating a CSF binary,
users should input the CSF description file created in the step above and
receive a CSF binary, which contains the CSF commands, SRK table, signatures
and certificates.