omap3: Replace ARCH_OMAP34XX with ARCH_OMAP3

arch/arm/mach-omap2/Kconfig

arch/arm/mach-omap2/io.c

arch/arm/mach-omap2/mcbsp.c

arch/arm/mach-omap2/mux.c

arch/arm/mach-omap2/mux.h

arch/arm/mach-omap2/omap_hwmod_34xx.h

arch/arm/plat-omap/Kconfig

arch/arm/plat-omap/common.c

arch/arm/plat-omap/gpio.c

arch/arm/plat-omap/i2c.c

arch/arm/plat-omap/include/plat/cpu.h

arch/arm/plat-omap/include/plat/io.h

arch/arm/plat-omap/include/plat/mcbsp.h

arch/arm/plat-omap/include/plat/omap34xx.h

arch/arm/plat-omap/mcbsp.c

arch/arm/plat-omap/sram.c

drivers/net/smc911x.h

drivers/spi/Kconfig

drivers/spi/omap2_mcspi.c

drivers/usb/Kconfig