treewide: Drop most cases of `sizeof(struct ...)`

Spelling out the struct type name hurts readability and introduces
opportunities for bugs to happen when the pointer variable type is
changed but the corresponding sizeof is (are) not.

Tested: `make CONFIG_EVERYTHING=yes CONFIG_JLINK_SPI=no VERSION=none -j`
with and without this patch; the flashrom executable does not change.

flashrom-stable: Applied partially.

Change-Id: Icc0b60ca6ef9f5ece6ed2a0e03600bb6ccd7dcc6
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/55266
Original-Reviewed-by: Nico Huber <nico.h@gmx.de>
Original-Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
diff --git a/ichspi.c b/ichspi.c
index 3e1040d..90bbd13 100644
--- a/ichspi.c
+++ b/ichspi.c
@@ -1734,7 +1734,7 @@
 	ich_generation = ich_gen;
 	ich_spibar = spibar;
 
-	memset(&desc, 0x00, sizeof(struct ich_descriptors));
+	memset(&desc, 0x00, sizeof(desc));
 
 	/* Moving registers / bits */
 	switch (ich_generation) {