docs: printk-formats: update size-casting examples

Since commit 72deb45 ("block: remove CONFIG_LBDAF") sector_t and
blkcnt_t types are no longer variable in size, making them unsuitable
examples for casting to the largest possible type. This patch replaces
such examples with cycles_t and blk_status_t types, whose sizes depend
on architecture and config options respectively.

Signed-off-by: Carlos Llamas <cmllamas@google.com>
Link: https://lore.kernel.org/r/20210609195058.3518943-1-cmllamas@google.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Author: Carlos Llamas

Documentation/core-api/printk-formats.rst

@@ -37,14 +37,13 @@ Integer types
 		u64			%llu or %llx
 
 
-If <type> is dependent on a config option for its size (e.g., sector_t,
-blkcnt_t) or is architecture-dependent for its size (e.g., tcflag_t), use a
-format specifier of its largest possible type and explicitly cast to it.
+If <type> is architecture-dependent for its size (e.g., cycles_t, tcflag_t) or
+is dependent on a config option for its size (e.g., blk_status_t), use a format
+specifier of its largest possible type and explicitly cast to it.
 
 Example::
 
-	printk("test: sector number/total blocks: %llu/%llu\n",
-		(unsigned long long)sector, (unsigned long long)blockcount);
+	printk("test: latency: %llu cycles\n", (unsigned long long)time);
 
 Reminder: sizeof() returns type size_t.