hv_netvsc: Rearrange the hv_negtvsc_packet to be space efficient

struct hv_netvsc_packet {

	/* Bookkeeping stuff */

	u8 status;

	u8 is_data_pkt;

	u8 xmit_more; /* from skb */

	u8 cp_partial; /* partial copy into send buffer */

	u16 vlan_tci;

	u8 rmsg_size; /* RNDIS header and PPI size */

	u8 rmsg_pgcnt; /* page count of RNDIS header and PPI */

	u8 page_buf_cnt;

	u8 pad0;

	u16 vlan_tci;

	u16 q_idx;

	u32 send_buf_index;

	u32 total_data_buflen;

	u32 pad1;

	struct vmbus_channel *channel;

	u64 send_completion_tid;

	void *send_completion_ctx;

	void (*send_completion)(void *context);

	u32 send_buf_index;

	/* This points to the memory after page_buf */

	struct rndis_message *rndis_msg;

	u8 rmsg_size; /* RNDIS header and PPI size */

	u8 rmsg_pgcnt; /* page count of RNDIS header and PPI */

	u32 total_data_buflen;

	/* Points to the send/receive buffer where the ethernet frame is */

	void *data;

	u8 page_buf_cnt;

	struct hv_page_buffer *page_buf;

};