i2c: Update references to individual i2c commands

The individual i2c commands imd, imm, inm, imw, icrc32, iprobe, iloop,
and isdram are no longer available so all references to them have been
updated to the new form of "i2c <cmd>".

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/README b/README
index 03ad69a..75fc4b7 100644
--- a/README
+++ b/README
@@ -1430,9 +1430,9 @@
 		CONFIG_SYS_I2C_NOPROBES
 
 		This option specifies a list of I2C devices that will be skipped
-		when the 'i2c probe' command is issued (or 'iprobe' using the legacy
-		command).  If CONFIG_I2C_MULTI_BUS is set, specify a list of bus-device
-		pairs.	Otherwise, specify a 1D array of device addresses
+		when the 'i2c probe' command is issued.  If CONFIG_I2C_MULTI_BUS
+		is set, specify a list of bus-device pairs.  Otherwise, specify
+		a 1D array of device addresses
 
 		e.g.
 			#undef	CONFIG_I2C_MULTI_BUS
@@ -2866,14 +2866,7 @@
 cp	- memory copy
 cmp	- memory compare
 crc32	- checksum calculation
-imd	- i2c memory display
-imm	- i2c memory modify (auto-incrementing)
-inm	- i2c memory modify (constant address)
-imw	- i2c memory write (fill)
-icrc32	- i2c checksum calculation
-iprobe	- probe to discover valid I2C chip addresses
-iloop	- infinite loop on address range
-isdram	- print SDRAM configuration information
+i2c	- I2C sub-system
 sspi	- SPI utility commands
 base	- print or set address offset
 printenv- print environment variables