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
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/62840
Original-Reviewed-by: Felix Singer <felixsinger@posteo.net>
Original-Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>
Original-Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
diff --git a/ch341a_spi.c b/ch341a_spi.c
index b22d9a2..f415617 100644
--- a/ch341a_spi.c
+++ b/ch341a_spi.c
@@ -387,7 +387,7 @@
 
 static const struct spi_master spi_master_ch341a_spi = {
 	.features	= SPI_MASTER_4BA,
-	/* flashrom's current maximum is 256 B. CH341A was tested on Linux and Windows to accept atleast
+	/* flashrom's current maximum is 256 B. CH341A was tested on Linux and Windows to accept at least
 	 * 128 kB. Basically there should be no hard limit because transfers are broken up into USB packets
 	 * sent to the device and most of their payload streamed via SPI. */
 	.max_data_read	= 4 * 1024,
@@ -428,7 +428,7 @@
 
 	int32_t ret = libusb_init(NULL);
 	if (ret < 0) {
-		msg_perr("Couldnt initialize libusb!\n");
+		msg_perr("Couldn't initialize libusb!\n");
 		return -1;
 	}