MPU6K: Use shorter perf names

src/drivers/mpu6000/mpu6000.cpp

@@ -553,14 +553,14 @@ MPU6000::MPU6000(int bus, const char *path_accel, const char *path_gyro, spi_dev
 	_gyro_range_scale(0.0f),
 	_gyro_range_rad_s(0.0f),
 	_sample_rate(1000),
-	_accel_reads(perf_alloc(PC_COUNT, "mpu6000_accel_read")),
-	_gyro_reads(perf_alloc(PC_COUNT, "mpu6000_gyro_read")),
-	_sample_perf(perf_alloc(PC_ELAPSED, "mpu6000_read")),
-	_bad_transfers(perf_alloc(PC_COUNT, "mpu6000_bad_transfers")),
-	_bad_registers(perf_alloc(PC_COUNT, "mpu6000_bad_registers")),
-	_good_transfers(perf_alloc(PC_COUNT, "mpu6000_good_transfers")),
-	_reset_retries(perf_alloc(PC_COUNT, "mpu6000_reset_retries")),
-	_duplicates(perf_alloc(PC_COUNT, "mpu6000_duplicates")),
+	_accel_reads(perf_alloc(PC_COUNT, "mpu6k_acc_read")),
+	_gyro_reads(perf_alloc(PC_COUNT, "mpu6k_gyro_read")),
+	_sample_perf(perf_alloc(PC_ELAPSED, "mpu6k_read")),
+	_bad_transfers(perf_alloc(PC_COUNT, "mpu6k_bad_trans")),
+	_bad_registers(perf_alloc(PC_COUNT, "mpu6k_bad_reg")),
+	_good_transfers(perf_alloc(PC_COUNT, "mpu6k_good_trans")),
+	_reset_retries(perf_alloc(PC_COUNT, "mpu6k_reset")),
+	_duplicates(perf_alloc(PC_COUNT, "mpu6k_duplicates")),
 	_controller_latency_perf(perf_alloc_once(PC_ELAPSED, "ctrl_latency")),
 	_register_wait(0),
 	_reset_wait(0),