documentation: add more early_param boot options

@@ -129,6 +129,13 @@ and is between 256 and 4096 characters. 
 ./include/asm/setup.h as COMMAND_LINE_SIZE.
 
 
+	additional_cpus=  [IA-64,X86-32,X86-64]
+			Format: <int>
+			Specify the number of additional hotplug CPUs that
+			should be supported/allowed.  Can be used to
+			override BIOS info or to provide this info if not
+			already available.
+
 	acpi=		[HW,ACPI,X86-64,i386]
 			Advanced Configuration and Power Interface
 			Format: { force | off | ht | strict | noirq }

@@ -1077,6 +1084,8 @@ and is between 256 and 4096 characters. 
 			If there are multiple matching configurations changing
 			the same attribute, the last one is used.
 
+	lmb=debug	[KNL] Enable lmb debug messages.
+
 	load_ramdisk=	[RAM] List of ramdisks to load from floppy
 			See Documentation/ramdisk.txt.
 

@@ -1474,6 +1483,9 @@ and is between 256 and 4096 characters. 
 
 	nr_uarts=	[SERIAL] maximum number of UARTs to be registered.
 
+	ohci1394_dma=early	[HW] enable debugging via the ohci1394 driver.
+			See Documentation/debugging-via-ohci1394.txt for more info.
+
 	olpc_ec_timeout= [OLPC] ms delay when issuing EC commands
 			Rather than timing out after 20 ms if an EC
 			command is not properly ACKed, override the length