remove old atheros kernels and patches

target/linux/atheros/config-2.6.23

target/linux/atheros/config-2.6.24

target/linux/atheros/config-2.6.25

target/linux/atheros/patches-2.6.23/100-board.patch

target/linux/atheros/patches-2.6.23/110-spiflash.patch

...et/linux/atheros/patches-2.6.23/130-ar2313_ethernet.patch

...x/atheros/patches-2.6.23/140-redboot_partition_scan.patch

target/linux/atheros/patches-2.6.23/150-bridge-printk.patch

...x/atheros/patches-2.6.23/200-ar2313_enable_mvswitch.patch

target/linux/atheros/patches-2.6.24/100-board.patch

target/linux/atheros/patches-2.6.24/110-spiflash.patch

...et/linux/atheros/patches-2.6.24/130-ar2313_ethernet.patch

...x/atheros/patches-2.6.24/140-redboot_partition_scan.patch

target/linux/atheros/patches-2.6.24/150-bridge-printk.patch

...eros/patches-2.6.24/900-cevt_r4k_irq_disable_hazard.patch

...eros/patches-2.6.24/901-get_c0_compare_irq_function.patch

target/linux/atheros/patches-2.6.25/100-board.patch

target/linux/atheros/patches-2.6.25/110-spiflash.patch

...et/linux/atheros/patches-2.6.25/130-ar2313_ethernet.patch

...x/atheros/patches-2.6.25/140-redboot_partition_scan.patch