net: lpc32xx: correct command register reset value

According to LPC32x0 User Manual the following bits in Command
register 0x3106_0100 are defined:

  Bit    Symbol
    2  - Unused
    3  RegReset
    4   TxReset
    5   RxReset

Fix wrong (1-bit shifted right) COMMAND_RESETS value, which sets
an unused bit, but neglects RxReset.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Acked-by: Albert ARIBAUD (3ADEV) <albert.aribaud@3adev.fr>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

drivers/net/lpc32xx_eth.c

@@ -170,7 +170,7 @@ struct lpc32xx_eth_registers {
 #define COMMAND_PASSRUNTFRAME 0x00000040
 #define COMMAND_FULL_DUPLEX   0x00000400
 /* Helper: general reset */
-#define COMMAND_RESETS        0x0000001C
+#define COMMAND_RESETS        0x00000038
 
 /* STATUS register bitfields/masks and offsets (see Table 283) */
 #define STATUS_RXSTATUS 0x00000001