Global cleanup: Fix a few spelling errors

Just a trivial patch to fix a few errors found by codespell.

Here's the command I used:
codespell -S subprojects,out \
-L fwe,dout,tast,crate,parms,claus,nt,nd,te,truns,trun

Signed-off-by: Martin Roth <gaumless@gmail.com>
Change-Id: I4e3b277f220fa70dcab21912c30f1d26d9bd8749
Reviewed-on: https://review.coreboot.org/c/flashrom/+/62840
Reviewed-by: Felix Singer <felixsinger@posteo.net>
Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

lspcon_i2c_spi.c

@@ -271,7 +271,7 @@ static int lspcon_i2c_spi_send_command(const struct flashctx *flash,
 	ret |= lspcon_i2c_spi_enable_write_status_register(fd);
 	ret |= lspcon_i2c_spi_toggle_register_protection(fd, 1);
 
-	/* First byte of writearr shuld be the command value, followed by the value to write.
+	/* First byte of writearr should be the command value, followed by the value to write.
 	   Read length occupies 4 bit and represents 16 level, thus if read 1 byte,
            read length should be set 0. */
 	packet_t packet = {