Use cstyle -cpP in make cstyle check

Enable picky cstyle checks and resolve the new warnings.  The vast
majority of the changes needed were to handle minor issues with
whitespace formatting.  This patch contains no functional changes.

Non-whitespace changes are as follows:

* 8 times ; to { } in for/while loop
* fix missing ; in cmd/zed/agents/zfs_diagnosis.c
* comment (confim -> confirm)
* change endline , to ; in cmd/zpool/zpool_main.c
* a number of /* BEGIN CSTYLED */ /* END CSTYLED */ blocks
* /* CSTYLED */ markers
* change == 0 to !
* ulong to unsigned long in module/zfs/dsl_scan.c
* rearrangement of module_param lines in module/zfs/metaslab.c
* add { } block around statement after for_each_online_node

Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Reviewed-by: Håkan Johansson <f96hajo@chalmers.se>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #5465

include/linux/simd_x86.h

@@ -208,8 +208,8 @@ xgetbv(uint32_t index)
 	uint32_t eax, edx;
 	/* xgetbv - instruction byte code */
 	__asm__ __volatile__(".byte 0x0f; .byte 0x01; .byte 0xd0"
-		: "=a" (eax), "=d" (edx)
-		: "c" (index));
+	    : "=a" (eax), "=d" (edx)
+	    : "c" (index));
 
 	return ((((uint64_t)edx)<<32) | (uint64_t)eax);
 }
@@ -229,13 +229,13 @@ __cpuid_check_feature(const cpuid_feature_desc_t *desc)
 		 * are passed by value.
 		 */
 		__cpuid_count(desc->leaf, desc->subleaf,
-			r[EAX], r[EBX], r[ECX], r[EDX]);
+		    r[EAX], r[EBX], r[ECX], r[EDX]);
 		return ((r[desc->reg] & desc->flag) == desc->flag);
 	}
 	return (B_FALSE);
 }
 
-#define	CPUID_FEATURE_CHECK(name, id) 				\
+#define	CPUID_FEATURE_CHECK(name, id)				\
 static inline boolean_t						\
 __cpuid_has_ ## name(void)					\
 {								\