[U-Boot] PATCH: Fixed PPC4xx compilation warning in 4xx_enet.c

[Alessio Centazzo <acpatin@yahoo.com>]

This patch fixes a compilation warning for some Ethernet PHY-less PPC4xx platforms (440SPE based ones) and a potential compilation error for 440SP platforms (use of undefined 'ethgroup' variable).  In the original code and in case of 440SPE platforms, 'ethgroup' is initialized to -1 and never modified.  Later in the function, within an #ifdef statement, an 'if statement' executes code only if 'ethgroup' is set to 4, therefore it is harmless to avoid executing the 'if statement' by removing the CONFIG_440SPE from the affected #ifdefs.  In case of 440SP platforms  with on-board Ethernet PHY, 'ethgroup' is undefined but used (there are not such platforms in the repository yet). All other architectures are not affected by this
change.
This is the current warning message with a Ethernet PHY-less 440SPE platform build (there is not such platform in the repository yet):

4xx_enet.c: In function 'ppc_4xx_eth_init':
4xx_enet.c:880: warning: unused variable 'ethgroup'

Signed-off-by: Alessio Centazzo acpatin {AT} yahoo {DOT} com

diff -Nau u-boot-2009.06/drivers/net/4xx_enet.c.orig u-boot-2009.06/drivers/net/4xx_enet.c
--- u-boot-2009.06/drivers/net/4xx_enet.c.orig    2009-06-14 12:30:39.000000000 -0700
+++ u-boot-2009.06/drivers/net/4xx_enet.c    2009-06-17 08:34:54.000000000 -0700
@@ -873,7 +873,7 @@
     defined(CONFIG_405EX)
     u32 opbfreq;
     sys_info_t sysinfo;
-#if defined(CONFIG_440GX) || defined(CONFIG_440SPE) || \
+#if defined(CONFIG_440GX) || \
     defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
     defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
     defined(CONFIG_405EX)
@@ -1122,7 +1122,6 @@
 
 #if defined(CONFIG_440GX) || \
     defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
-    defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
     defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
     defined(CONFIG_405EX)