remove empty lines and redundant variables

Author: Qinghao Shi

targets/TARGET_ARM_FM/TARGET_FVP_MPS2/SDK/ETH_MPS2.c

@@ -188,7 +188,7 @@ unsigned int smsc9220_read_id(void)
     return SMSC9220->ID_REV;
 }
 
-// Initiates a soft reset, returns failure or success.
+// Initiates a soft reset, returns 0 on success, or 1 on failure. 
 unsigned int smsc9220_soft_reset(void)
 {
     int timedout;
@@ -260,18 +260,14 @@ unsigned int smsc9220_check_phy(void)
 unsigned int smsc9220_reset_phy(void)
 {
     unsigned short read;
-    int error;
 
-    error = 0;
     if (smsc9220_phy_regread(SMSC9220_PHY_BCONTROL, &read)) {
-        error = 1;
-        return error;
+        return 1;
     }
 
     read |= (1 << 15);
     if (smsc9220_phy_regwrite(SMSC9220_PHY_BCONTROL, read)) {
-        error = 1;
-        return error;
+        return 1;
     }
     return 0;
 }

targets/TARGET_ARM_FM/TARGET_FVP_MPS2/SDK/mps2_ethernet_api.c

@@ -60,14 +60,11 @@ int smsc9220_check_id(void)
 
 int smsc9220_check_macaddress(void)
 {
-    int error;
     const unsigned int mac_valid_high = 0xC00A;
     const unsigned int mac_valid_low = 0x00F70200;
     unsigned int mac_low;
     unsigned int mac_high;
 
-    error = 0;
-
     // Read current mac address.
     smsc9220_mac_regread(SMSC9220_MAC_ADDRH, &mac_high);
     smsc9220_mac_regread(SMSC9220_MAC_ADDRL, &mac_low);
@@ -82,11 +79,10 @@ int smsc9220_check_macaddress(void)
 
 
     if (mac_high != mac_valid_high || mac_low != mac_valid_low) {
-        error = TRUE;
-        return error;
+        return 1;
     }
 
-    return error;
+    return 0;
 }
 
 void smsc9220_print_mac_registers()

targets/TARGET_ARM_FM/TARGET_FVP_MPS2/TARGET_FVP_MPS2_M0P/device/SMM_MPS2.h

@@ -20,24 +20,5 @@
 #ifndef MBED_DEVICE_H
 #define MBED_DEVICE_H
 
-
-
-
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-
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-
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-
 #include "objects.h"
-
 #endif