drivers/ddr/fsl: Cleanup unused variable

Variable "row_density" is no longer used. Drop it from DIMM structure.
Signed-off-by: NYork Sun <york.sun@nxp.com>

drivers/ddr/fsl/ddr1_dimm_params.c

@@ -270,7 +270,6 @@ unsigned int ddr_compute_dimm_parameters(const unsigned int ctrl_num,
 	pdimm->n_banks_per_sdram_device = spd->nbanks;
 	pdimm->edc_config = spd->config;
 	pdimm->burst_lengths_bitmask = spd->burstl;
-	pdimm->row_density = spd->bank_dens;
 
 	/*
 	 * Calculate the Maximum Data Rate based on the Minimum Cycle time.

drivers/ddr/fsl/ddr2_dimm_params.c

@@ -269,7 +269,6 @@ unsigned int ddr_compute_dimm_parameters(const unsigned int ctrl_num,
 	pdimm->n_banks_per_sdram_device = spd->nbanks;
 	pdimm->edc_config = spd->config;
 	pdimm->burst_lengths_bitmask = spd->burstl;
-	pdimm->row_density = spd->rank_dens;
 
 	/*
 	 * Calculate the Maximum Data Rate based on the Minimum Cycle time.

drivers/ddr/fsl/ddr3_dimm_params.c

@@ -186,7 +186,6 @@ unsigned int ddr_compute_dimm_parameters(const unsigned int ctrl_num,
 	 * BL8 -bit3, BC4 -bit2
 	 */
 	pdimm->burst_lengths_bitmask = 0x0c;
-	pdimm->row_density = __ilog2(pdimm->rank_density);
 
 	/* MTB - medium timebase
 	 * The unit in the SPD spec is ns,

drivers/ddr/fsl/ddr4_dimm_params.c

@@ -264,7 +264,6 @@ unsigned int ddr_compute_dimm_parameters(const unsigned int ctrl_num,
 	 * BL8 -bit3, BC4 -bit2
 	 */
 	pdimm->burst_lengths_bitmask = 0x0c;
-	pdimm->row_density = __ilog2(pdimm->rank_density);
 
 	/* MTB - medium timebase
 	 * The MTB in the SPD spec is 125ps,

drivers/ddr/fsl/interactive.c

@@ -241,7 +241,6 @@ static void fsl_ddr_dimm_parameters_edit(fsl_ddr_info_t *pinfo,
 		DIMM_PARM(n_banks_per_sdram_device),
 #endif
 		DIMM_PARM(burst_lengths_bitmask),
-		DIMM_PARM(row_density),
 
 		DIMM_PARM(tckmin_x_ps),
 		DIMM_PARM(tckmin_x_minus_1_ps),

include/fsl_ddr_dimm_params.h

@@ -40,7 +40,6 @@ typedef struct dimm_params_s {
 	unsigned int n_banks_per_sdram_device;
 #endif
 	unsigned int burst_lengths_bitmask;	/* BL=4 bit 2, BL=8 = bit 3 */
-	unsigned int row_density;
 
 	/* used in computing base address of DIMMs */
 	unsigned long long base_address;