csky: Kconfig: Remove unused selects

 - GENERIC_ALLOCATOR is duplicated
 - Remove USB_ARCH_HAS_OHCI & USB_ARCH_HAS_EHCI, because they
   have been removed from linux.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Cc: Arnd Bergmann <arnd@arndb.de>

arch/csky/Kconfig

@@ -76,8 +76,6 @@ config CSKY
 	select PERF_USE_VMALLOC if CPU_CK610
 	select RTC_LIB
 	select TIMER_OF
-	select USB_ARCH_HAS_EHCI
-	select USB_ARCH_HAS_OHCI
 	select GENERIC_PCI_IOMAP
 	select HAVE_PCI
 	select PCI_DOMAINS_GENERIC if PCI
@@ -245,7 +243,6 @@ endchoice
 
 menuconfig HAVE_TCM
 	bool "Tightly-Coupled/Sram Memory"
-	select GENERIC_ALLOCATOR
 	help
 	  The implementation are not only used by TCM (Tightly-Coupled Meory)
 	  but also used by sram on SOC bus. It follow existed linux tcm