staging: rts5208: combine ifs where possible

Join together chained if's where possible to lower the indentation
level.

In a lot of places of this code the indentation level is already very
high.
As a result, this patch increases the code flow and readability.
Signed-off-by: Giedrius Statkevičius <giedrius.statkevicius@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rts5208/rtsx_chip.c

@@ -289,13 +289,11 @@ int rtsx_reset_chip(struct rtsx_chip *chip)
 	/* Enable ASPM */
 	if (chip->aspm_l0s_l1_en) {
 		if (chip->dynamic_aspm) {
-			if (CHK_SDIO_EXIST(chip)) {
-				if (CHECK_PID(chip, 0x5288)) {
+			if (CHK_SDIO_EXIST(chip) && CHECK_PID(chip, 0x5288)) {
 				retval = rtsx_write_cfg_dw(chip, 2, 0xC0, 0xFF, chip->aspm_l0s_l1_en);
 				if (retval != STATUS_SUCCESS)
 					TRACE_RET(chip, STATUS_FAIL);
 			}
-			}
 		} else {
 			if (CHECK_PID(chip, 0x5208))
 				RTSX_WRITE_REG(chip, ASPM_FORCE_CTL,
@@ -350,18 +348,14 @@ int rtsx_reset_chip(struct rtsx_chip *chip)
 
 	}
 
-	if (CHECK_PID(chip, 0x5288)) {
-		if (!CHK_SDIO_EXIST(chip)) {
-			retval = rtsx_write_cfg_dw(chip, 2, 0xC0, 0xFFFF,
-						0x0103);
+	if (CHECK_PID(chip, 0x5288) && !CHK_SDIO_EXIST(chip)) {
+		retval = rtsx_write_cfg_dw(chip, 2, 0xC0, 0xFFFF, 0x0103);
 		if (retval != STATUS_SUCCESS)
 			TRACE_RET(chip, STATUS_FAIL);
 
 		retval = rtsx_write_cfg_dw(chip, 2, 0x84, 0xFF, 0x03);
 		if (retval != STATUS_SUCCESS)
 			TRACE_RET(chip, STATUS_FAIL);
-
-		}
 	}
 
 	RTSX_WRITE_REG(chip, IRQSTAT0, LINK_RDY_INT, LINK_RDY_INT);
@@ -1727,10 +1721,8 @@ int rtsx_pre_handle_interrupt(struct rtsx_chip *chip)
 	chip->ocp_int = ocp_int & status;
 #endif
 
-	if (chip->sd_io) {
-		if (chip->int_reg & DATA_DONE_INT)
+	if (chip->sd_io && (chip->int_reg & DATA_DONE_INT))
 		chip->int_reg &= ~(u32)DATA_DONE_INT;
-	}
 
 	return STATUS_SUCCESS;
 }
@@ -1796,8 +1788,7 @@ void rtsx_do_before_power_down(struct rtsx_chip *chip, int pm_stat)
 
 void rtsx_enable_aspm(struct rtsx_chip *chip)
 {
-	if (chip->aspm_l0s_l1_en && chip->dynamic_aspm) {
-		if (!chip->aspm_enabled) {
+	if (chip->aspm_l0s_l1_en && chip->dynamic_aspm && !chip->aspm_enabled) {
 		dev_dbg(rtsx_dev(chip), "Try to enable ASPM\n");
 		chip->aspm_enabled = 1;
 
@@ -1822,7 +1813,6 @@ void rtsx_enable_aspm(struct rtsx_chip *chip)
 					0xFFFF, val);
 		}
 	}
-	}
 }
 
 void rtsx_disable_aspm(struct rtsx_chip *chip)
@@ -1830,8 +1820,7 @@ void rtsx_disable_aspm(struct rtsx_chip *chip)
 	if (CHECK_PID(chip, 0x5208))
 		rtsx_monitor_aspm_config(chip);
 
-	if (chip->aspm_l0s_l1_en && chip->dynamic_aspm) {
-		if (chip->aspm_enabled) {
+	if (chip->aspm_l0s_l1_en && chip->dynamic_aspm && chip->aspm_enabled) {
 		dev_dbg(rtsx_dev(chip), "Try to disable ASPM\n");
 		chip->aspm_enabled = 0;
 
@@ -1845,7 +1834,6 @@ void rtsx_disable_aspm(struct rtsx_chip *chip)
 
 		wait_timeout(1);
 	}
-	}
 }
 
 int rtsx_read_ppbuf(struct rtsx_chip *chip, u8 *buf, int buf_len)