manpage: Fix markup and parameter description for dirtyjtag_spi

The heading for the subsequent entry should start with `.SS`, the
`.BR` was probably spurious (led to missing whitespace) and the
parameter name is `spispeed`, the argument placeholder `frequency`.

Change-Id: Ie0ce51d5fcd1a45cd0362ed08d8992169184ab3d
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/73256
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jean THOMAS <virgule@jeanthomas.me>
diff --git a/flashrom.8.tmpl b/flashrom.8.tmpl
index 3536e66..4ac3fd8 100644
--- a/flashrom.8.tmpl
+++ b/flashrom.8.tmpl
@@ -1339,23 +1339,20 @@
 can be
 .BR 62.5k ", " 125k ", " 250k ", " 500k ", " 1M ", " 2M " or " 4M
 (in Hz). The default is a frequency of 4 MHz.
-.sp
+.SS
 .BR "dirtyjtag_spi " programmer
 .IP
 An optional
-.B freq
+.B spispeed
 parameter specifies the frequency of the SPI bus.
 Syntax is
 .sp
 .B "  flashrom \-p dirtyjtag_spi:spispeed=frequency"
 .sp
 where
-.B spispeed
-can be
-.BR any value in hertz, kilohertz or megahertz supported by the
-programmer. The default is a frequency of 100 KHz.
-.sp
-.SS
+.B frequency
+can be any value in hertz, kilohertz or megahertz supported by the programmer.
+The default is a frequency of 100 kHz.
 .SS
 .BR "jlink_spi " programmer
 .IP