some perf counter enum values missing from rp2350 hardware/structs/busctrl.h

``` typedef enum bus_ctrl_perf_counter_rp2350 { arbiter_rom_perf_event_access = 19, arbiter_rom_perf_event_access_contested = 18, arbiter_xip_main_perf_event_access = 17, arbiter_xip_main_perf_event_access_contested = 16, arbiter_sram0_perf_event_access = 15, arbiter_sram0_perf_event_access_contested = 14, arbiter_sram1_perf_event_access = 13, arbiter_sram1_perf_event_access_contested = 12, arbiter_sram2_perf_event_access = 11, arbiter_sram2_perf_event_access_contested = 10, arbiter_sram3_perf_event_access = 9, arbiter_sram3_perf_event_access_contested = 8, arbiter_sram4_perf_event_access = 7, arbiter_sram4_perf_event_access_contested = 6, arbiter_sram5_perf_event_access = 5, arbiter_sram5_perf_event_access_contested = 4, arbiter_fastperi_perf_event_access = 3, arbiter_fastperi_perf_event_access_contested = 2, arbiter_apb_perf_event_access = 1, arbiter_apb_perf_event_access_contested = 0 } bus_ctrl_perf_counter_t; ``` there should be a lot more; this matches RP2040 I think