[ot] hw/opentitan: ot_flash: Fix word calculation

This wasn't causing any major problems (accidentally reading too many
words from flash when reading keymgr seeds, but the right number of
bytes were copied out when sending to the keymgr), but should be fixed
regardless.

Signed-off-by: Alex Jones <[email protected]>

Author: AlexJones0

hw/opentitan/ot_flash.c

@@ -83,8 +83,8 @@
 #define FLASH_SEED_BANK           0u
 #define FLASH_SEED_INFO_PARTITION 0u
 #define FLASH_SEED_WIDTH          256u
-#define FLASH_SEED_WORDS          ((FLASH_SEED_WIDTH) / sizeof(uint32_t))
 #define FLASH_SEED_BYTES          ((FLASH_SEED_WIDTH) / 8u)
+#define FLASH_SEED_WORDS          ((FLASH_SEED_BYTES) / sizeof(uint32_t))
 
 static_assert(FLASH_SEED_BYTES == OT_FLASH_KEYMGR_SECRET_BYTES,
               "Flash seed & keymgr secret sizes do not match");